查询词典 envelope

The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

Meshing properties and application of major conical surface double envelope Hourglass worm gearing;2. In this paper, the regularities of undercutting and topping of major conical surface envelope hourglass worm is researched.

分析了大锥面包络环面蜗杆的齿顶变尖和根切规律，并通过和平面包络环面蜗杆的比较，得出其在根切和齿顶变尖这两个方面具有比平面包络蜗杆更优良的性能，因而是一种在实际中可替代平面包络、具有广泛应用前景的新型包络蜗杆传动。

Study on geometry theory and engagement characteristics of scroll profiles Aiming as the limitations of scroll profiles in existence, the whole characteristics and local characteristics of plane curve instinct equation were studied. Analyzed the equidistant curve of envelope principle, normal equidistant curve creating method and envelope equidistant curve creating method were gained.

针对现有表征方式的局限性和不足之处，从微分几何角度出发，研究了平面曲线固有方程的局部特性和整体特性，分析了通用涡旋型线等距曲线和包络原理，得到了法向等距曲线生成及包络法等距曲线生成方法，推导了通用涡旋型线的坐标变换方法，得到了通用涡旋型线的平面啮合理论。

Now we have known that SARS-CoV encoded 11 varietal proteins. They have 4 constitutive proteins: spike protein, membrane protein, envelope protein and nucleocapsid protein. Spike protein trimer form spike and exsertion? virus peplos on the surface. Spike protein is archi-surface antigen component of virus, it has acceptor binding and membrane fusion activity. Spike protein has important effect at tissue tropism, cell-fusion and toxicity. Nucleocapsid protein can bind genome RNA to shape neucleocapsid. Membrane protein and envelope protein are necessary constituent to shape virus peplos. Spike protein is I-type membrane glycoprotein, it mediate virus binding with host cell epimembranal acceptor and to fuse host cell membrane.

SARS-CoV属于巢状病毒目、冠状病毒科，为单正链RNA病毒，基因组全长约29.7kb，已知编码11种蛋白，其中包括4种结构蛋白，分别是刺突蛋白、包膜蛋白、小包膜蛋白和核蛋白或核壳体蛋白。S蛋白三聚体形成突起，伸出包膜表面。S蛋白是病毒的主要表面抗原成分，具有受体结合和膜融合活性，在组织嗜性、细胞融合和毒力等方面起重要作用。N蛋白与基因组RNA结合形成核衣壳。M蛋白和E蛋白是包膜形成所必需的成分。

The project proposed and established the strict unique mathematical model of instantaneous frequency aiming at the currently existed problems in Hilbert Huang Transform form the viewpoint of physical connotative meaning; proposed and established the strict mathematical model of general intrinsic mode signal based on the concept of general continuous intrinsic mode signal and the compositive principle of practical general intrinsic mode signal; researched and proposed the fitting method of envelope lines in HHT from the viewpoint of theory, conquered the blindness and random in quondam EMD envelope line fitting and boundary treatment; developed a virtual time-frequency analyzer based on general intrinsic mode signal decomposition to open out the local time-frequency characteristics of nonlinear and nonstationary signal more deeply and accurately.

本项目针对希尔伯特-黄变换现阶段存在问题，从物理内涵的角度提出并建立了瞬时频率严格的唯一的数学模型；基于连续性的一般固有模态信号的概念和实际信号的一般固有模态信号的组成原理，提出并建立了一般固有模态信号严格的数学模型；从理论角度研究并提出HHT中的包络线构造方法，克服了原EMD的包络线构造和边界处理的盲目性和随意性；研发一台基于一般固有模态信号分解的虚拟式时频分析仪，使之可以更深入、准确地揭示非线性非平稳信号的时频局部特征。

The suggested method was applied to varying excitation pulse shapes: square envelope and chirped hyperbolic secant envelope.

本文将替换过程分为服务替换和路径替换2种方式，并详细介绍了这2种替换方式的实现方法。

Results With the new procedure, the tip of the prostate was peeled off completely without extra treatment, and this piece of the urethra,which was composed of surgical envelope, formed a vase-shaped natural surface to avoid urine irretention. The resected plane was covered by fibre and epithelium of surgical envelope,which could reduce irritation of urethra and bladder, and shorten hematuria and repair time. After enucleation of the enlarged prostate, the borderline became clear and blood supply was reduced, which facilitated the rapid resection without injury.

结果 采用新的切割方法前列腺尖部被完整剜除，无需修整，尖部尿道成为由外科包膜构成的喇叭口状自然界面，经过剜除的增生腺体，界面清楚，血供减少，利于快速切除，不易出现包膜损伤，切除效率明显提高。1000例手术顺利，术后发生短期尿道刺激症者150例，发生膀胱颈挛缩6例，尿道狭窄10例。

The brother really think only to so much, and feel very lost, because the removal of his grandfather, the elders gave away 100 yuan, can be uncle and grandfather only to 10 yuan, he was lost and angry, ran out, and I see uncle grandfather He went out on and my parents talked for a while, then my brother came in and told me 10 yuan should Jiuyeyeshuo and grandfather from the maternal uncle took over the red envelope, my brother open the red envelope a look at 100 yuan, just wiped out those who feel frustrated, he is like a rose to heaven from hell, like happy people who jumped up.

弟弟真的以为只给那么多，感觉到非常失落，因为除去他爷爷以外的长辈都给100元，可舅爷爷就只给10元，他很失落和生气，跑出去了，我舅爷爷看他出去了，就和我爸爸妈妈聊了一会，后来我弟弟进来了，就对我舅爷爷说10元钱也要，并从舅爷爷手中接过了红包，弟弟打开红包一看是100元，刚才那些感到失落的心情一扫而光，他就像一个从地狱升到天堂的人一样高兴的跳了起来。

One summer they planned to fly to New York fo their holidays.They got to the airport only ten minutes before the plane left.So time was short,but suddenly Mrs.Long said she must tell Linda,their daughter,not to forget to lock the front door when she went to school.As Linda was then at school,they couldn't tell her about it by telephone.So the couple hurried to the post office.Mrs.Long wrote a short note to Linda while Mr.Long bought a stamp and an envelope.Soon the note was ready .They put the stamp on the envelope in a hurry and put it in the letter box.But suddenly Mrs.Long began to cry.The short note was still in her hand.She had put the plance ticket in the envelope!

一个夏天他们计划飞往纽约度假，他们在飞机离开前仅十分钟才到了飞机场，所以时间很短，但是突然Long太太说她必须去告诉他们的女儿Linda，当她上学时不要忘记锁自家的前门，现在女儿正在学校，他们不能用电话告诉女儿，所以这对夫妻很快去了邮局，当Long先生买了一枚邮票和一个信封时，Long太太写了一个小纸条给Linda，很快纸条写好了，他们很快把邮票贴在信封上，之后把它扔进信箱里，但是突然Long太太开始哭，那个小纸条还在他的手上，她已经把机票放在了信箱了！

One summer they planned to fly to New York for their holidays.They got to the airport only ten minutes before the plane left.So time was short.But suddenly Mrs.Long said she must tell Linda,their daughter,not to forget to lock the front door when she went to school.As Linda was than at school,they coundn't tell her about it by telrphone.So the couple hurried to the post office.Mrs.Long wrote a short note to Linda while Mr.Long bought a stamp and an envelope.Soon the note was ready.They put the stamp on the envelope in a hurry and put it in the letter box.But suddenly Mrs.Long began to try.The short note was still in her hand.She had put the plane ticket in the envelope.

一个夏天他们计划飞往纽约度假，他们在飞机离开前仅十分钟才到了飞机场，所以时间很短，但是突然Long太太说她必须去告诉他们的女儿Linda，当她上学时不要忘记锁自家的前门，现在女儿正在学校，他们不能用电话告诉女儿，所以这对夫妻很快去了邮局，当Long先生买了一枚邮票和一个信封时，Long太太写了一个小纸条给Linda，很快纸条写好了，他们很快把邮票贴在信封上，之后把它扔进信箱里，但是突然Long太太开始哭，那个小纸条还在他的手上，她已经把机票放在了信箱了！

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。