位

The best compositions of the polishing solution for the crystal surface and of the etchant for revealing dislocations are given.

确定了所选定的位错侵蚀剂的侵蚀规范；此侵蚀剂对晶面无选择性，能显示出刃型和螺型位错，以及&新&、&旧&位错。

For signed-bit values, if the number to be encoded is positive, an extra bit is necessary to preserve the leading 0; otherwise sign extension changes the bit value into a negative number.

对于带符号的位值，如果这个编码长度能够确定，一个扩展位必须保留第一位是0；否则，符号扩展将改变这个位值为负数。

In order to study the effects of 3 protein-4.2 point mutations associated with HS, we have cloned four recombinant fusion proteins: GST-P4.2 (31-200) D175Y, GST-P4.2 (31-200) D175Y, GST-P4.2 (100-260) D175Y, GST-P4.2 (31-200) A142T with pointmutation, to do prokaryotic expression, and tested their interactions with ankyrin by Far-Western blot and Pull-down assay, but there were no evidences to show these mutated proteins can bind to ankyrin except GST-P4.2 (31-200) A142T.

于是我们采用了点突变的方法，克隆表达了4种重组的突变蛋白GST-P4.2(31-200)D175Y、GST-P4.2(31-200)D175Y、GST-P4.2(100-260)D175Y，GST-P4.2(31-200)A142T，发现第175位氨基酸残基的突变使得相应的重组蛋白均不能与ankyrin直接相互作用，而第142位氨基酸残基的突变对P4.2与ankyrin之间的相互作用没有影响，这说明第175位氨基酸对于P4.2与ankyrin的结合是非常重要的，很可能是一个关键位点。

Fourthly, the concentration processes for liquid membrane separation are studied. The feed tank levels are difficult to be tracked efficiently in the random-rinsing and continuous-discharging nanofiltration process.The tracking control of feed tank levels is improved by the selective control and the transparent predictive functional control.

针对液体膜分离浓缩过程采用纳滤随机清洗连续排料操作方式时原料罐液位的不能有效跟踪控制问题，提出了原料罐液位的选择性控制及以预测函数控制PFC为监督层、常规PID为控制层的透明控制结构，实现了以常规PID为基础控制、PFC为设定值给定的原料罐液位的跟踪控制。

Tonight, I speak to you not as a candidate for President, but as a citizen—a proud citizen of the United States, and a fellow citizen of the world.

今晚，我并不是以一名总统候选人的身份在这里发言，而是以一位公民-一位以美国为荣的公民和一位世界公民的身份跟大家讲话。

Often they will surprise me: A young flaxen-haired woman in the middle of farm country will deliver a passionate plea for intervention in Darfur, or an elderly black gentleman in an inner-city neighborhood will quiz me on soil conservation.

他们经常会使我惊讶：在乡下农场中，有一位头发是亚麻色的妇女，她充满激情地请愿干预达尔福尔的武装动乱（北欧人的发色多为亚麻色，这位妇女的种族与她所关心的达尔富尔黑人形成对照），还有在市内城区社区的一位老年的黑人绅士，盘问我有关土壤保持的问题。

Most of our patients complained of a variable degee of pruritus (11/15). Nine patients had multiple flesh-colored papules distributing on the vulva. The coexistence of eyelid syringomas was found in one third of our series (5/15), and four of them also had a family history of extragenital syringomas.

在临床表现上，11位病人有不同程度的痒感，而其中有9人的病灶为多发性肤色丘疹，5位病人同时合并有其他部位的汗管瘤，其中的4位有家族成员也有汗管瘤病灶。

Model UTD Electronic Float Bowl Liquid Level Transmitter is a new kind of electric liquid level meter in our company, absorbed the advanced liquid level measuring technology of abroad and researched and manufactured.

UTD型电动浮筒式液位变送器是我公司吸取了国外先进液位测量技术而开发研制的一种新型电动液位测量仪表。

With spatial sequence taking the place of temporal sequence and succession time as ecological dimension, the niche volumes and overlaps of various species were quantitatively investigated in the manmade florae of Shapotou Area to study the resource-exploiting capacities, interspecific similarities and competition mechanisms of various community components of manmade florae in sand areas in community succession.

在沙坡头沙区人工植被群落区，采用空间序列代替时间序列，并以演替时间为生态位维度，通过定量分析物种的生态位体积和生态位重迭，研究沙区人工植物群落演替过程中群落各组分种对资源的利用能力、种间生态相似性及竞争机制。

With spatial sequence taking the place of temporal sequence and succession time as ecological dimension, the niche volumes and overlaps of various species were quantitatively investigated in the manmade florae of Shapotou Area to study the resource-exploiting capacities, interspecific similarities and competition mechanisms of various community components of manmade florae in sand areas in community succession.

在沙坡头沙区人工植被群落区，采用空间序列代替时间序列，并以演替时间为生态位维度，通过定量分析物种的生态位体积和生态位重叠，研究沙区人工植物群落演替过程中群落各组分种对资源的利用能力、种间生态相似性及竞争机制。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。