非常喜爱的，明显偏向的，或者珍爱的人

(A favorite, a particular preference; the object of somebody's affection)

She is the apple of my eye.

长时间工作没休息

(To work long hours without rest)

One shouldn't burn the candle at both ends.

保持安静，不要说话/守口如瓶

(To keep quiet and don't speak)

Button up your lips!

形容一个人花很长时间坐着或者躺着，比如看电视等

(A person who spends too much time sitting or lyingdown,usually watching television.)

He is such a couch potato on weekends.

略过一些重要内容来达到目标的简便方式

(To do something in the easiest or cheapest way by skipping something important.)

She cut corners going to work in a hurry.

让人感觉很生气/无聊透顶

(To make someone very angry or very bored.)

You drive me up the wall！

被忽略或者将要被解决的明显事实

(An obvious truth that is either being ignored or going unaddressed.)

You cited population growth as the“ elephant in the corner of the room”

非常开心或者兴奋

(To feel very happy or excited)

Within twenty minutes I was as highas a kite.

一种处于非常刺激/危险的生活状态

(To have a type of life in which you are often involvedin exciting or dangerous activities.)

There was too much pressure on me and I was living on the edge of breakdown.

指一个人行为举止很奇怪

(Someone who behaves strangely)

He has become as mad as a hatter.