smile/grin from ear to ear 笑得合不攏嘴

He smiled from ear to ear when he received this birthday gift.

當(dāng)他收到這生日禮物時(shí)笑得合不攏嘴。

talk one’s ear off 喋喋不休

I’m sorry to talk your ear off, i just need somebody to talk to.

不好意思，對妳說了這么久，我只是想找一個(gè)人傾訴。

play it by ear見機(jī)行事

He can play it by ear and handles everything in order.

他能隨機(jī)應(yīng)變，所以他把一切事物處理的井井有條。

keep an ear to the ground 保持高度警覺，及早發(fā)現(xiàn)那些即將發(fā)生的事情的預(yù)兆

Reporters keep an ear to the ground so as to know as soon as possible what will happen.

記者們注意輿論的動(dòng)向，以便盡早知道將要發(fā)生的事情。