With chemical testing, knowing which genes to modify is hard.
用药物进行实验，要知道那种基因需要改良比较困难。
Have you heard anything about that one, knowing which, one knows all?
你有没有听说过某些事情和某个知道一切的人有关？
The first step is knowing which foods are better options when it comes to energy density.
谈到能量密度第一步即应了解哪些食品更适合我们选用。
Knowing which way you lean can save you so much time and energy, it's flabbergasting.
了解你所倾向的方式有助于节省时间和精力。这令人非常吃惊！
Well, the trick is knowing which rules are made to be broken, and which rules are not.
诀窍是明白哪些规则是可以打破的，哪些规则不能。
An important aspect of dealing with the tag is knowing which components go with which states.
处理标签的一个重要方面是知道哪些组件有哪些状态。
If we choose to have an E3, we will lack the benefit of knowing which use case flows to choose.
如果我们选择要E3，我们将不知道选择哪些用例流。
File. Not knowing which php.ini file Apache is using to configure itself is a security problem.
不知道Apache正在使用哪个php . ini文件配置自己是一个安全问题。
The toughest part of working with XML is often just knowing which tool is best for a specific application.
使用XML时最困难的部分通常就是了解哪个工具最适合于某个特定的应用程序。
Waiting is painful. Forgetting is painful. But not knowing which to do is the worse kind of suffering.
等待是一种痛。忘却也是一种痛。但不知道该怎么办，是一种更折磨人的痛。
Waiting is painful. Forgetting is painful. But not knowing which to do is the worst kind of suffering.
等待是痛苦的，遗忘也是痛苦的。但不知该等待还是该遗忘是最痛苦的折磨。
He felt a real country bumpkin, sitting in that expensive restaurant, not knowing which cutlery to use.
他觉得自己像个土老帽儿，坐在高级餐厅里，不知道该用哪一件餐具。
I remember knowing which ones my friends had and negotiating terms to play for them and collect all of them.
我还想起了那时候知道我的朋友们有什么样的弹球后去跟他们谈条件，通过比赛去赢得人家的弹球，还想把那些弹球全部收入囊中。
There are many types of annuities available and knowing which the right one for you is can be difficult.
有许多种类的年金可知道这是一项正确的对你可能很困难。
Knowing which tools provide which features and functionality helps you choose the software that best fits your needs.
了解了什么工具可以提供什么样的特性和功能，帮助您选择最适合您需要的软件。
What he needed was to get the jump on the crowds by knowing which carriage he should board to arrive at the platform exit.
其实要想避开人群的话，他只需要在上地铁的时候知道哪节车厢是直通月台出口就行了；
Certainly the facade has no way of knowing which record is right, so the client must initiate the create or update (write) operation.
当然，facade没有办法知道哪条记录是正确的，所以客户端必须发起创建或者更新(写)操作。
A realization that only comes with time is that knowing which friends are real is much more important than having a lot of them.
随著时间我们体会到，重要的不是你交了多少朋友，而是明白哪些朋友才是真的。
Often, knowing which build to test is left to "tribal knowledge" — where you need to know the right people to know which build to use.
通常，了解要测试哪个构建就是由“系统知识”来决定的——您要知道适当的人群要了解使用哪个构建。
Languages: Knowing which languages to list on your resume is always a tricky thing Do you list everything you've ever worked with?
语言：在你的简历上列出你熟悉的语言是件比较难办的事情。
Knowing which ports are open on a host is an important first step for an attacker to deduce possible vulnerabilities to the target host.
知道主机上哪些端口是打开的，对于攻击者推断目标主机上可能存在的弱点是重要的第一步。
Knowing which TV programmes are being most widely passed around online can help broadcasters when negotiating with advertisers or planning schedules.
这样就能知道那些电视节目在网络上流传的最广，从而帮助广播公司与广告商谈价或者安排播出计划。
This is very useful for seeing whether or not a particular object is currently above the horizon, and for knowing which direction to look in order to see the object.
这对查看一个精确的天体是否超出当前的地平圈是很有用的，而且可以知道要看到这个天体应朝哪一方向看。
By knowing which departments in Acme would be impacted by this change and what the impact of such a change is, the COE helps arrive at appropriate architecture decisions.
通过了解Acme中的哪些部门会受到此更改的影响，以及这样的更改的影响是什么，COE帮助得出了适当的体系结构决策。
By knowing which departments in Acme would be impacted by this change and what the impact of such a change is, the COE helps arrive at appropriate architecture decisions.
通过了解Acme中的哪些部门会受到此更改的影响，以及这样的更改的影响是什么，COE帮助得出了适当的体系结构决策。
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