He made a weak attempt to look cheerful.

他有气无力地摆出高兴的样子。

《牛津词典》

He was criticized as a weak and indecisive leader.

他被批评是位既懦弱又优柔寡断的领导人。

《柯林斯英汉双解大词典》

She was born with a weak heart.

她生来就有一个衰弱的心脏。

《牛津词典》

A person suffering heat exhaustion feels weak and extremely tired.

VOA: special.2010.07.27

All right, so that's a weak argument, but in fact, it's a way of suggesting, probably not.

这是一种提议，可能是错的，好了，那我们对一个列表。

麻省理工公开课 - 计算机科学及编程导论课程节选

Deuteronomy also emphasizes social justice and personal ethics and neighborly responsibility. God's own righteous behavior on behalf of the weak and the oppressed is a model for Israel's righteous behavior.

申命记还强调社会公正和个人道德,以及邻里责任，上帝自身的代表弱者和被压迫者的,正直的行为是以色列人正直行为的范本。

耶鲁公开课 - 旧约导论课程节选

Pakistan is a troubled land, a formal democracy with weak a civilian government and dominant army.

FORBES: The Travails Of Pakistan: Why Some Countries Don't Work

Imagine a doctor telling you she is deliberately prescribing an excessive dose of a drug because she prescribed too weak a dose the last time.

FORBES: Downgrade Follies

Glass is different: "new" is too weak a word to use.

BBC: Google Glass - will we love it or hate it?