He was grinning from ear to ear.

他笑得合不拢嘴。

《牛津词典》

Many mothers smiled from ear to ear when they got the news that children could go back to school.

听到孩子们可以重返学校的消息，许多母亲都笑得合不拢嘴。

youdao

After hearing the good news, my father smiled from ear to ear.

在听到这个好消息后，父亲笑得合不拢嘴。

youdao

Play it by ear also means to decide what to do at the last minute instead of making detailed plans.

VOA: special.2009.09.13

Writing the book was as if I had eyes over my shoulder or voices speaking to my ear.

写这本书就好比自我反省,听自己在辩论一样。

普林斯顿公开课 - 人性课程节选

But, Hobbes believes it is simpler and easier and therefore more likely to catch the ear of a sympathetic prince.

霍布斯还相信,只有比较简单易懂的书,才更容易引起君王的怜悯之心。

耶鲁公开课 - 政治哲学导论课程节选

"Lana grinned from ear to ear when she was holding them, " her husband said.

CNN: STORY HIGHLIGHTS

The government's special advisers were beaming from ear to ear and have a right to.

BBC: IMF set out a 'Plan B' for George Osborne

"Especially with the three goals I scored, " added the Senegal star, grinning from ear to ear.

BBC: Momo ponders his future