Keep your eyes open in history class.

在历史课上保持警觉。

The exhibition will open in March and last for three months.

展览将于三月开幕并持续三个月。

Normally open contacts are open in their normal state.

常开触点在正常状态下是断开的。

Roddick won the US Open in 2003.

罗迪克在2003年赢得了美国网球公开赛。

She kicks the door open in frustration.

她愤怒地踢开了门。

She found the door open in astonishment.

她惊讶地发现门是开着的。

She kicked the door open in frustration.

她愤怒地踢开了门。

I heard the door creak open in the middle of the night.

我听到门在半夜嘎吱作响地打开。

The temple of Janus in Rome had doors that were closed in times of peace and open in times of war.

罗马的雅努斯神庙在和平时期关门，在战争时期开门。

They tend to be more open in interpersonal relationships.

他们在人际关系上往往更开放。