1）I have a bunch of friends! 我有很多朋友!　　a bunch of keys 一串钥匙

a bunch of flowers 一束鲜花

A friend in need is a friend indeed! 患难朋友才是真正的朋友!

fair-weather friends: 只可共安乐而难共患难的朋友;酒肉朋友

The fair-weather friends will come to you when you are in a good mood and share the happiness with you, but leaves you alone when you are in trouble!

2）He is a walking dictionary! 他学识渊博!

quizshow 提示我们进入一个误区!

Don't be a Jack of all trades!

You should be a master of sth.