put on (或 lose) weight

become fatter (or thinner)

体重增加，发胖（或体重减少、变瘦）

throw one's weight about (或 around)

(informal)be unpleasantly self-assertive

(非正式)趾高气扬，大摆架子

throw one's weight behind

(informal)use one's influence to help support

(非正式)（利用影响力）支持

the weight of the world

used in reference to a very heavy burden of worry or responsibility

很大的担心；重大的责任

he continues to carry the weight of the world on his shoulders.

他继续肩负重任。

be a weight off one's mind

come as a great relief after one has been worried

（担心之后）十分放松，松了一大口气

be worth one's weight in gold

(of a person) exceedingly useful or helpful

（人）极其有用（或有帮助）的

by weight

According to weight rather than volume or other measure.

按重量：按照重量而不是容积或其它计量法