They are cowardly, and are always anticipating danger.
他们胆小怯懦，总是提防着危险。

He tried not to appear faint-hearted.
他努力使自己看起来不胆怯。

The mousy man looked up.
那个胆小的男人抬起头来。

They are by nature fearful and timid.
他们天生就胆小怕事。

Your son is a bit of a coward.
你的儿子是相当胆小的。

She is as timorous as a rabbit.
她胆小得像只兔子。

Mark is too lily-livered to dive off the high board.
马克太胆小，不敢从高台跳水。

He got cold feet at the last minute.
事到临头他却胆怯了。