116、problem K.K: [ ] IPA: [ ]
n. 问题；困难问题；添麻烦的人或事 ★★★

The problem is when we should do it.
问题是我们应该什么时候做。
We have to settle the problem.
我们得解决这个问题。

【额外成就感】
☆ His son is a problem to him.
他儿子老给他添麻烦。
☆ A: What’s the problem?
出什么事了？
B: I can’t seem to find my keys.
我好象找不到钥匙了。