必须的

SOUTH CHINA, which was established in 1988, possessses excellent printing engineers and workers and HEIDELBERG 4-color and 2-color offset printing machines made in Germany plate copying apparatus and PS processor made in Japan and UV varnishing machine made in Taiwan.

公司位于交通便利的湖南省会长沙市区，拥有一个外向型彩色印刷企业所必须的各方面专业技术人员和较高技能的印刷工人；拥有先进的德国海德堡四色和双色胶印机，有日本的晒板机、显影机以及台湾的UV机。

Our results indicate that it is essential to consider electronic polarizations of the substrates in order to understand different binding affinities in protein-protein and protein-ligand binding.

我们的结果表明在对于蛋白质和蛋白质以及蛋白质和配体的结合自由能，结合强度的研究中，考虑极化效应的影响是必须的。

Padding and margins are needed for the header tags if we don''t want to have very big gabs between the title and the links below, just some space exactly how we want it, and for me that is 10px at the bottom.

除了设置文字的字体和颜色之外，padding和margin的定义也是必须的，因为如果不明确指定的话，栏目标题和链接列表之间的间隔可能会不可预期，在这里我直接用margin属性定义了10px的下边距。

We identified the most conserved sites in the GLUT1 and found out a new motif which is probably crucial for the selectivity of GLUTs for the transported sugars like QLS motif.

在GLUT1中，除已经验证QLS和QLG这两个重要的模序外，我们还发现了另外新的一个非常保守的模序，该模序的功能可能和QLS类似，是GLUT1转运葡萄糖所必须的。

Teachers and students should both recognize increased efficiency and momentum because the two parties will be working symbiotically-teachers introducing, demonstrating, guiding and pulling back; and students exploring, attempting, internalizing self-motivation and then understanding (and perhaps initiating the next cycle of scaffolded activity).

bull；学生应能理解的方向和期望后，这些内容已经实施，由老师。提供这项计划的目的，教训已经明确，这反映出重上部分学生不应该逆流的信息背诵死记硬背，而是真诚的报告，他/她了解必须的工作范围在手和评估战略的老师。

Any claimant under this insurance policy shall at the request and at the expense of the Insurance Company do and concur in doing and permit to be done all such acts and things as may be necessary or reasonably required by the Insurance Company for the purpose of enforcing any rights and remedies or of obtaining relief or indemnity from other parties to which the Insurance Company shall or would be entitled or subrogated to upon its paying for or making good any destruction or damage under the respective Section, whether such acts and things shall be or become necessary or required before or after his indemnification by the Insurance Company.

应保险公司的要求并由保险公司支付费用，本保险单项下的任何索赔人应完成、同意完成并允许完成为了实施任何权利或救济或者为了从其他第三方获得免责或赔偿（保险公司按各节规定，因就任何灭失或损害予以支付或者修复而应享有或有权享有该等免责或赔偿或取得该等免责或赔偿的代位求偿权）而可能必要的或者为保险公司合理要求的一切行为或事务，无论该等行为或事务在保险公司对其予以偿付之前或之后属必要或成为必要或者是必须的。

And in another sense, an obligation still subsists, although the civil obligation is said to be a bond containing a penalty, with a condition annexed for the payment of money, performance of covenants or the like; it differs from a bill which is generally without a penalty or condition though it may be obligatory.

在另一种意义上的义务，但仍然存在的民事责任是：含有一个点球，债券的附加条件，性能的钱支付条款或类似的议案，它有别于一般没有惩罚或状态，尽管它可能是必须的。

"We've always assumed that life was a planetary phenomenon. Only on planets would you have the liquids thought necessary for the chemistry of life," he said."So if you could have life in the hot gases of a star, or in the hot, interstellar gas that suffuses the space between the stars, well, not only would that be 'life as we don't know it' but it might be the most common type of life."

&我们总是认为生命是行星上存在的一种现象，因为只有在行星上才拥有生命化学变化所必须的液体，&肖斯塔克称，&因此，如果在恒星的高温气体中，或者在恒星与恒星之间充满太空的星际热气中存在生命，这种'生命'将是我们所不了解的，同时却又是最普遍存在的一种生命。&

It is necessary because even when one is ultimately found not guilty, the act of being tried for a crime still tarnishes the defendant's reputation, so it is desirable to make the trial of an innocent party as rare as possible.

这是很有必要的，因为尽管一人最终被判无罪，但是对他的审判行为仍然会损害他的名誉。因此，尽量减少对无罪当事人的审判是很必须的。

When the output branch number is more than 2, we can construct a cascade connection of Y-branch waveguides. However, it occupies a large optical circuit area. The power dividers with 2N output branches can be setup by arranging (2N-1) branch waveguide. However, the design of dividing structures with output branches of odd number such as three or five are difficult.

当输出波导数大於2时，可以用串接的方式来增加输出波导数，但是所需空间会变大，而光功率分配器的2N分岔输出是可以由(2N-1)的分岔输出结构改变而来的，所以在设计奇数波导输出像是3或是5的波导数输出结构就成为一个必须的课题。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。