不寒而栗【bù hán ér lì】
tremble with fear
[成] 不冷而发抖,形容非常恐惧

我一想起那条大蟒蛇,就感到不寒而栗。
I trembled with fear at the thought of the boa constrictor.
不好意思【bù hǎo yì si】
1. feel embarrassed; would be rude 2. sorry
[动短] 1、表示碍于情面而只能怎样或不便怎样 2、对不起,抱歉

她总说不好意思去我家,怕打扰我的家人。
She would not come to my house and always says that it would be impolite to disturb us.

不好意思,我不是有意伤害你的。
Sorry. I didn't mean to hurt you.
不见【bú jiàn】
1. disappear 2. not see; not meet
[动] 1、看不到,找不到 2、未见面

那架直升飞机在公园上空盘旋了一会儿之后就不见了。
The helicopter disappeared after hovering over the park for a while.

虽然我们多年不见,可彼此一直有书信来往。
We have been in correspondence though we haven't seen each other for years.