put on (或 lose) weight

become fatter (or thinner)

體重增加，發(fā)胖（或體重減少、變瘦）

throw one's weight about (或 around)

(informal)be unpleasantly self-assertive

(非正式)趾高氣揚(yáng)，大擺架子

throw one's weight behind

(informal)use one's influence to help support

(非正式)（利用影響力）支持

the weight of the world

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

很大的擔(dān)心；重大的責(zé)任

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

他繼續(xù)肩負(fù)重任。

be a weight off one's mind

come as a great relief after one has been worried

（擔(dān)心之后）十分放松，松了一大口氣

be worth one's weight in gold

(of a person) exceedingly useful or helpful

（人）極其有用（或有幫助）的

by weight

According to weight rather than volume or other measure.

按重量：按照重量而不是容積或其它計(jì)量法