You should know him well enough to give the perfect gift to perk him up.

你应该对他充分了解，送他适当的礼物使他振作。

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Probing the concept of Web Based Course, first we should define the network, secondly study the inner connotation of the curriculum, then, we can give a perfect definition of Web-Based Course.

探讨网络课程的概念首先应该界定网络，其次要深入研究课程的内涵，在此基础上才能给网络课程下一个比较完善的定义。

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If you cannot give three really good reasons why you are perfect for the job, why should a potential employer take the time to do it?

FORBES: Six Reasons You May Still Be Unemployed

This puts political and ethical limits on how far the drive for economic equality ought to go. (Strictly practical limits, as well, since too noble a determination to take from the rich to give to the poor will end up impoverishing everyone.) It also means that perfect economic equality should never be embraced, even implicitly, as an ideal.

ECONOMIST: Poverty and inequality