查询词典 X

PMMA compound X-ray lenses are composed of a group of 40 plano-concave elementary lenses positioned in line with axial symmetry.

用LIGA技术中的软 X射线光刻方法制作了PMMA材料 X射线组合透镜。

Then, in the following sections our progresses on X-ray spectrum diagnosis and point projection method were given, and the experimental results were laid out with discusses.

第五章是本文的核心内容，首先简要介绍X射线时、空、谱诊断的主要框架，然后分别介绍了我们在X射线能谱诊断及点投影成像应用诊断的研究进展，以及在神光Ⅱ装置第九路上的实验结果，并给出了必要的分析。

Polyembryonyoccurs in 〓 and 〓 caryopsis of cross SB-1 X Balilla(Balilla is non-polyembryony),and in 〓 caryopsis ofits reciprocal the polyembryony is observed but not in 〓caropsis.

在正交（SB-1 X 马来红，马来红不具多胚特性）〓及〓颖果中都出现了多胚苗，反交（马来红 X SB-1）的〓颖果未出现多胚苗，但其〓颖果观察到多胚苗，表明SB-1的多胚不是合子裂生产生的，而是胚囊的一种特殊性状。

Each record of the input file contains one positive integer x.

每行是一个需要转换的正整数x，其中x小于5000。

Methods HBV DNA was extracted from the serum of patient with hepatitis B. The X gene was amplified by PCR using the primers with EcoRI and HindⅢ digestion sites, and then cloned into pronucleus expression vector pMAL-C2X, which was detected by EcoRI and HindⅢ digestion and sequence.

从乙肝病人血清中提取HBV DNA；以带有EcoRI和HindⅢ酶切位点的引物，用PCR方法扩增X基因；而后定向克隆到原核表达载体pMAL-C2X上，经酶切鉴定和序列分析；以IPTG诱导X融合蛋白的表达。

Aql X-1 is one of the Atoll sources with kHz QPO. We have studied the correlations between the frequency of kHz QPO and the shape of X-ray spectrum. Implications of our results for the accretion and quasi periodic oscillation production process are discussed.

Aquila X-1是一个具有kHz QPO的Atoll源，我们研究了其kHz QPO频率和能谱之间的相关性质，并讨论了结果对了解吸积及准周期振荡产生过程的意义。

He added that there could one day be a useful outlet to the discovery - x-ray machines that would be cheaper and safer than conventional machines that require a permanent radioactive source and a highly trained technician for maintenance.

他补充说，也许有一天这个发现能派上用场――廉价安全的X光机，不象通常的X光机那样需要永久放射源，以及高度培训过的技工做维护。

Results the imaging manifestations of osteoid osteoma revealed a circular or oval radiolucency with different bone sclerosis around the nidus.the diameter ranged from 0.3cm to 1.6cm,with the average of 0.9cm.among 18 cases,only 14 cases showed nidus on plain film, all 15 cases with ct scanning showed nidus.the detection rate of nidus was 78％(14/18) for x-ray plain film and 100％(15/15) for ct, respectively.

结果 18例病灶均表现为一圆形或卵圆形的透亮区，直径0.3～1.6cm，平均0.9cm，其周围有不同程度的骨质硬化。18例x线平片仅14例显示瘤巢，15例行ct检查者均清楚显示瘤巢，x线和ct对瘤巢显示率分别为78％(14∕18)和100％(15∕15)。

All lesions were 7-12 mm in greatest diameter. Seven cases showed a round radiolucency or a thin clear sclerotic rim in middle or up-outer of femoral neck on X-ray film.

结果：8例股骨颈疝窝均为单侧单发病灶，X线平片仅显示7例，CT均表现为股骨颈前方皮质下类圆形骨质缺损，内为较均匀液体密度，边缘清楚伴有硬化缘，最大径线为7-12 mm.7例在X线平片上表现为股骨颈中轴线或其外上方的类圆形透亮区或硬化环。

An x-ray of the ''.'spinal'.'' cord after injection of air or a radiopaque substance into the ''.

脊髓x线照片脊髓的x射线，它将空气或射线不能透过的物质注入蜘蛛网膜下的''。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。