知道什么时候不使用邮件。
Using them well (or knowing when not to use them) is a skill.
使用好模式（或知道什么时候不使用模式）是一项技能。
Practical examples of when not to use DigestSearch include.
何时不使用DigestSearch的实际示例包括。
The purpose of getting financially smart is to know when to use debt and when not to.
在财政上变明智的目的是知道何时使用债务以及何时避免使用。
Learning when to cache - or more specifically, when not to cache - can be a little trickier.
了解何时进行缓存—或者更具体地说，何时不缓存—才可能有点儿麻烦。
The guide provides information on when to use, and also when not to use, specific medicines.
指南说明了何时使用以及何时不该使用专用药品。
Know When Not to Start - Trust your instincts of the book based on the first fifteen pages.
留意开头——在读一本书前十五页的时候相信你的直觉。
The second step is to know what information to share, when to share it, and when not to share it.
第二步，了解应该分享什么信息、何时分享以及不分享。
We'll also tell you when not to talk to your child about death and the euphemisms you should avoid.
我们还将看到，在什么情况下应该避免跟孩子谈论死亡，什么时候又该单刀直入，避免拐弯抹角。
Know When not to Finish - There is nothing wrong with putting a book down that you were halfway through.
适时结束——半路就把一本书放下没有什么不妥。
One thing that seems to result from self-awareness is the ability to know when to take the lead and when not to lead.
自我意识所产生的一件事情，就是判断什么去领导，什么时候不去领导的能力。
This article presents some patterns for using volatile variables effectively — and some warnings about when not to use them.
本文介绍了几种有效使用volatile变量的模式，并强调了几种不适合使用volatile变量的情形。
We will conclude by summarizing when to apply and when not to apply the data federation pattern and to list important constraints.
我们最后将总结何时应用数据联合模式及何时不应用此模式，并将列出重要的约束。
In turn, a simple walking test could help doctors and patients make decisions about when to perform certain screening tests — and when not to.
因此，一个简单的步行测试可以帮助医生和患者判断何时需要进行某些检测或者不需要。
In turn, a simple walking test could help doctors and patients make decisions about when to perform certain screening tests - and when not to.
因此，一个简单的步行测试可以帮助医生和患者判断何时需要进行某些检测或者不需要。
For each fixture type, this document explains the table format and fixture class structure and provides advice when to use and when not to use it.
文档针对每一种fixture都解释了其表格格式和fixture的类结构，还为使用这种fixture的具体时机提供了意见。
We tell you when to use and when not to use certain properties for best performance results, and where applicable, we provide you with alternative solutions.
为了取得最佳性能，我们将告诉您何时使用某些属性，何时不要使用这些属性，适当的地方我们会提供代替的解决方案。
Before you begin to design the architecture of your whole system, you have to make the following decision — when to use mobile Web services and when not to.
在开始设计整个系统的体系结构之前，您必须做出如下决定——何时使用移动Web服务以及何时不使用移动Web服务。
“In training, the most important lesson they teach you is when not to do something,” he said. “But in real life, it's all about staying out of trouble and surviving.
“上学时，老师教我们的最重要内容就是什么事不可以做，”他说，“但在现实生活中，我们得到的教训就是如何避免遇到麻烦，并在社会上生存下去。”
It's certainly easy to say when not to use one: when the incremental benefit over XML 1.0 is small, or the route to preserving your data in XML 1.0 is fragile or lossy.
说不使用要更容易一些：如果与XML 1.0相比带来的受益很小，或者把数据保存到XML 1.0的方法很脆弱或者容易丢失，那么就不使用。
On physical education and extra-curricular activities to prepare before the warming-up, attention should be paid to exercise when not to dramatic collision, so as not to be knocked down or fall.
上体育课和课外活动前要作好准备活动，运动时要注意不要剧烈碰撞，以免撞伤或摔伤。
It's a bit inconsiderate of her not to let you know when she expects to arrive.
她不让你知道她什么时候会到，这样做有些不体谅人。
I found it's much better to praise him when he obeys and not to be so fussy when he makes mistakes.
我发现当他听话时表扬他，而当他犯错误时不要也太挑剔，这样会好得多。
I try not to stress out when things go wrong.
出问题时，我尽量不紧张。
When things aren't going well, he encourages me, telling me not to give up.
当事情不顺利的时候，他鼓励我，告诉我不要放弃。
If you zipped the files first, they did not become read-only when written to the CD.
如果你先压缩了这些文件，写入光盘时它们就不变成只读文件。
It's not unusual for the police to close ranks when one of their officers is being investigated.
在一位警员受到调查时，警察抱团的事并不罕见。
Giving advice when it's not called for is the quickest way to end a good friendship.
在不需要时给予建议是了结一段友谊的最快方式。
Giving advice when it's not called for is the quickest way to end a good friendship.
在不需要时给予建议是了结一段友谊的最快方式。
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