他脸上露出严肃的神情。

His face was grave.

youdao

突然，他那原本严肃的神情一下子放松下来，脸上也绽开了笑容。

Suddenly his face relaxed and creased into a huge smile.

youdao

照片中的男孩神情严肃地直视着前方，就好像在凝望他的未来。

This boy looks straight ahead rigorously, as if he is looking into the future.

youdao

他把事故的经过告诉他们的时候，脸上的神情很严肃。

His face was grave as he told them about the accident.

youdao

他脸上的神情突然严肃起来，声音也压低了。

His face suddenly turned solemn, his voice confidential.

youdao

孔子听到这样的论调，不由自主地神情严肃起来。

Hearing the view, Confucius could not help but became serious.

youdao

孔子听到这样的论调，不由自主地神情严肃起来。

Hearing the view, Confucius could not help but became serious.

youdao