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Indefinite article "a/an" limits a noun to being a general thing or person.

当我们提及一个概括性的东西时，我们使用不定冠词&a/an&。这个不定冠词&a/an&限制了名词必须是概括的人或物。

Store opening and closing documents on transportation should be at the closing device, and also should do the following: a valve flap should be fixed in the open position b path ends with a foam board to plug in port, the port to be plugged with a boring cover, to dust, rust, clean and maintain the channel end of the formation; c cylinder parts to the appropriate protective packaging, shock and anti-collision; d valve should be placed on a smooth, pneumatic drive upwards, not with each other by the crowd.

存放月运输时启闭件应处于关闭装置，同时应做好以下工作： a 阀瓣应固定于开启位置 b 通径两端内口用泡沫板堵塞，端口须用闷盖塞紧，予以防尘、防锈，保持通道清洁和端面的平整； c 汽缸部位进行适当的包装防护、防震和防碰； d 阀门放置时应平稳，气动驱动装置朝上，不得相互受挤。

Result vitamin A and 4HPR fall to Hela cell collect form have apparent inhibition, can restrain Hela cell to be opposite the action causing tumor of naked rat (the curb tumour action of P.01); vitamin A issues visible cell solid by force to shrink at 4HPR(P.01); report lens, nuclear film is screwy, nuclear chromosome gathers agglomerate stand by the wither such as nuclear film to die DNA of cell of cellular feature; by degradation, a collection of illustrative plates of typical " of shape of " a flight of stairs appears in electrophoresis of agaragar candy gel.

结果维生素A和4HPR对Hela细胞集落形成有明显抑制功能，并可抑制Hela细胞对裸鼠的致瘤功能(P.01)；维生素A的抑瘤功能强于4HPR(P.01)；电镜下可见细胞固缩，核膜扭曲，核染色体聚集成块并靠近核膜等凋亡细胞特征；细胞DNA被降解，在琼脂糖凝胶电泳中呈现典型的&阶梯状&图谱。

In the first part of this thesis, Stress relaxation method set up in the software of DMA was used to perform the aromatic and aliphalic (D2192-BAPP) PI film stretching process. To study the optical anisotropies property to the light leakage from the crossed polarizers, we put the stretched samples into one set of crossed polarizers and as expected, the stretched PI films could reduce the light leakage at view angle of ±45 deg, and exhibited a visually observed compensating property of an A-plate. No color shift wasobserved, and the birefringence was very uniform. These results prove a uniform birefringence can be obtained by a stretched process for PI films.

首先，我们以动态机械分析仪的应力缓和模式对芳香族FDA-BAPP PI及脂肪族D2192-BAPP PI薄膜进行拉伸实验，并将拉伸后的PI薄膜置於一组相互交差的偏光片中观察其光学异向性，发现拉伸后的PI薄膜试片可以降低在±45o视角的漏光的效果，展现出如同A-Plate的光学补偿特性，所显现的光学补偿效果相当的均匀而且没有色偏的情形发生，证实以拉伸方法可以造成PI薄膜很均匀的双折射效应。

Secondly, we study a class of automorphisms of A, i.e., we prove that the set {φ∈SL_n|φ= t is a subgroup of AutA(n,t,Finally, we mainly discuss some properties of the operation w in A, i.e., g~w = 0, f~w = 0 and Leibniz identity.

其次，讨论了A的一类自同构，即证明了集合{φ∈SL_n|φ=t}是自同构群AutA(n，t的一个子群；最后，得到了A的运算w的一些性质，即g~w=0、f~w=0和Leibniz等式。

The results showed that (1) all the arteries tested had tachyphylaxis to peptidergic agonists;(2) the desensitization of the arteries tested to catecholamines was uneasy except BA;(3) the desensitizations to AⅡ, AVP and PE were homologous;(4) the endothelium-EDRF -cGMP pathway had no contribution to the tachyphylaxis of PA to AⅡ and AVP;(5) membrane receptor cycling (internaliation and re-insertion) contributed only in part to homologous desensitization;(6) there was no change in the function of voltage-dependent Ca〓 channel during desensitization to AⅡ and AVP;(7) some changes in G protein occurred during homologous desensitization;(8) the most surprising finding was that the caudal arterial smooth muscle of stroke-prone spontaneously hypertensive rat showed tachyphylaxis to α〓-adrenoceptor agonist PE, while the tachyphylaxis of pulmonary artery of SHR was not changed compared with that of Wistar rat.

脱敏是消除效应的一种有效方式。因此，研究不同血管对不同激动剂脱敏的差异及阐明脱敏的机制，有助于阐明血管活动个性化的机制。研究表明：血管对肽类激动剂的脱敏方式为快速脱敏，而对儿茶酚胺类激动剂不易脱敏；血管对肽类激动剂和儿茶酚胺类激动剂表现为同源脱敏；内皮-NO-cGMP通路不参与肺动脉对AⅡ和AVP的快速脱敏；用PAO抑制膜受体的内在化只能短暂抑制脱敏的发展，提示用膜受体数目的下调说不能完全解释同源脱敏；血管对AⅡ和AVP脱敏后VSMC细胞膜电压依赖性钙通道功能无改变；CA对AVP脱敏后GTPγS的量-效曲线下移，说明有G蛋白的变化，但这种变化并非G蛋白的亲和性改变；SHRsp之CA平滑肌对AⅡ和AVP的快速脱敏并未减弱，但对PE却表现为快速脱敏，这是我们首次发现的一个非常有趣的现象。

At the same time, the paper includes traits of embedded operating system μC/OS- II and the method of transplanting in the detail, and how to transplant the embedded TCP/IP protocol, in the foundation, I design a data collection system,which is made up of CGItechnic、51SCM、pint-size TCP/IP protocol、 Ethernet interface chip、A/D, D/A switch equipment.

同时本文详细介绍了嵌入式操作系统μC／OS-Ⅱ的结构特点和如何移植到处理器中，以及如何将嵌入式TCP／IP协议栈μIP移植其中，在此基础上在通过CGI技术构成了一个数据采集交互系统，系统通过51系统单片机、精简的TCP／IP协议栈、以太网接口芯片、A／D、D／A转换器等接口电路实现了系统的核心结构。

METHODS: Non-derivatised cuvette immobilised Lipid A was used to track the bonding between the Lipid A and aqueous extracts and alcoholic extracts from seventy-eight TCM, and then neutralized endotoxin in vitro by selecting hypso-bonding TCM that removed the tannins.

将革兰阴性细菌的脂质A包被于生物传感器的非衍生板建立靶点，跟踪测定赤芍、大黄、黄芩等78种中药的水提物和醇提物与Lipid A的结合活性，再将筛选出的中药去鞣质后与定量的内毒素（LPS，20、50ng·ml^-1）37℃孵育30min后，测定孵育后的样品与Lipid A的结合情况，以评价样品内的活性物质含量。

The global total consumption of mythyl ethyl ketone in 2004 was about 900 kt/a,with a production capacity of 1 300 kt/a,and it can be anticipated that by 2007 the market of methyl ethyl ketone will be overstocked.

2004年全球甲乙酮的总消费量约为90万t/a，生产能力约为130万t/a，预计2007年前甲乙酮市场仍将出现产能过剩的状况。

Instead of saying "right away", a Southerner might substitute any of the following:"faster than you can skin a cat";"quicker than you can say 'Jack Robinson'"(don't ask me who Jack is);"right now in a minute"; or "lickety-split".

南方人可以使用以下各种方式来替代&right away&的说法：&faster than you can skin a cat&、&quicker than you can say 'Jack Robinson'(比你念&Jack Robinson&还要快)&(我也不知道Jack是谁)、&right now in a minute&，或&lickety-split&。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。