电子邮件非常有用,但也非常危险,因为你不知道你的信息可能会传到哪里!
Email is very useful, but also very dangerous, as you don't know where your message might end up!
这样做可能对调试或设置系统非常有用,但也可能对性能产生巨大影响。
This can be useful while debugging or setting up a system, but can have a significant effect on performance.
但也别局限在图片上,相关的数据表和图表什么的也会非常有用。
Think beyond photographs –relevant diagrams and charts will also be of great interest.
The "who" questions are of course simple but they're very useful.
Who”问句特别简单,但也非常有用。
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