To detect someone's secret, I think this kind of action is very very unprincipled, especially your friend!

去窥探某人的秘密，这个行为是很不道德的，特别是朋友！

youdao

This is especially true of small things that show effort, such as going out of your way to buy your friend a book that you know he or she will like.

尤其是那些需要付出努力的小事情，比如你特意为你的朋友买了一本你知道他/她会喜欢的书。

youdao

Most people can see straight through a phony compliment, but if you think your friend looks especially nice today with that new hairstyle, tell her so.

通过假意的赞美，可以看出大多数人都是正直的，但如果你认为你朋友今天的新发型看起来特别漂亮，那么告诉她。

youdao

The name may be a familiar one to you, especially if it pulled your address from a computer of a friend or business associate.

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