And if that is the case, it is always good to have all the necessary tools in hand and that is why we think assisted reproduction does make sense.
如果真的是那样，那么手头上有所有必要的工具始终是件好事，这就是为什么我们认为辅助生育确实起作用了。
That is why the book discusses ways to provide alternative co-existent behaviors and explains how to bridge them, when necessary.
这也是为什么本书讨论了提供两种模式并存的方式，也解释了必要时如何在两者之间取得平衡。
Distribute a numbered agenda before the meeting that clearly defines why each person's attendance is necessary and follow it during the proceedings.
在会议开始前，向大家分发带有序号的会议提纲，这样可以明确表明为什么每个人的参与都是必要的，而且大家会在会议过程中遵守它。
For example, it is unclear why a registry is necessary to "Avoid duplication of effort"; it is the governing policy that can request that special procurement to be applied to avoid duplication.
例如，注册库对于“避免重复工作”的必要性就不 清晰；可以提出应用于避免重复劳动的特殊购买（即购买服务注册库）申请的主体是治理政策。
That is why this rule is necessary.
这就是为什么这项制度是必要的。
One fine afternoon I was walking along Fifth Avenue, when I remembered that it was necessary to buy a pair of socks. Why I wished to buy only one pair is unimportant.
一个晴朗的下午，我沿第五大街而行，忽然想起需要买双袜子。
If it's implied that each property has a getter and setter, and it usually is, why is it necessary to spell it out?
如果每个属性都具有一个getter和setter，并且通常如此，那么又何必详细说明呢？
Do you think that learning English through the Internet is necessary? If yes, why?
您觉得借由网路来学习英文是必要的吗？如果是，为什么？
That may explain why Weikert feels further adjustment of the rules is necessary before the next Olympics.
这也许可以解释为什么韦克特觉得下届奥运会前有必要进一步调整规则。
"But why is it necessary," said Edmund, "that Crawford's carriage, or his _only_, should be employed?"
“不过，”埃德蒙说，“为什么要用克劳福德的车，为什么只用他的车？”
Assignment amounts, in a sense, to reorganization of an enterprise. That explains why it is necessary to obtain approval from the examination and approval authority.
因为转让股权在一定意义上讲等于是企业重组，转让股权时要由审批机关批准，是很有必要的。
That is why we will provide the support necessary for you to complete college and meet a new goal: by 2020, America will once again have the highest proportion of college graduates in the world.
这也是为什么我们提供必要的资助，让你们完成学业，去迎接新的挑战。到2020年，美国将再次成为世界上大学毕业生占人口比例最高的国家。
If someone asks you why he needs to watch this, and is that necessary to take such a long time to study it?
如果有人想您提这样的问题，我为什么要看这个节目呢？这么长时间，我还要研究它，有这个必要吗？
If necessary, you can continue execution of the program from that point to see what happens to the object and perhaps determine why it is not properly deallocated.
如果必要，可以从该点继续执行程序，以查看对象发生了什么情况，或许可以确定未正确释放对象的原因。
It is the key whether or not person of ability who concerns that cultivate out in the colleges and universities genuinely possesses necessary know-why and the stronger practice ability;
是关系到高等学校培养出的人才是否真正具有必要的理论知识和较强的实践能力的关键；
Q. Now why is it, officer, if you trust your fellow officers with your life, that you find it necessary to lock your locker in a room you share with those same officers?
警官，如果你可以用自己的性命信任你的同事，为什么在和同事共用一个更衣室时你觉得有必要把衣柜锁上呢？
Q. Now why is it, officer, if you trust your fellow officers with your life, that you find it necessary to lock your locker in a room you share with those same officers?
警官，如果你可以用自己的性命信任你的同事，为什么在和同事共用一个更衣室时你觉得有必要把衣柜锁上呢？
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