1.by and large 大体而言

By and large, these people are peace-loving, law-abiding citizens.

大体来看，这些人都是热爱和平，遵纪守法的好公民T9nY4M=cXT_V7~kv[O;。

2.on the sidelines 观望

We realize how critical it is to get involved right now and not sit on the sidelines.

我们意识到，现在必须行动起来，不能再袖手旁观了q2ez[lnfI~5i)。

3.cast doubt on 引起……对……的怀疑

There are factors, however, that have cast doubt on the statue's authenticity.

然而，有些因素已经让人们对这座雕像的真实性产生了怀疑|+-_6RL;tSYO4。

4.on the line 处于危险之中

Firefighters do a job that sometimes requires them to put their lives on the line.

消防员们经常都是冒着生命在执行任务的i1]I27,_sm8]3b0_。