clutch (或 grasp, catch) at straws

be in such a desperate situation as to resort to even the most unlikely means of salvation

撈救命稻草，作最后的絕望掙扎

draw the short straw

be the unluckiest of a group of people, especially in being chosen to perform an unpleasant task

抽到下下簽（尤指被選中去執(zhí)行倒霉任務）

the last (或 final) straw

a further difficulty or annoyance, typically minor in itself but coming on top of a whole series of difficulties, that makes a situation unbearable

最終使人無法忍受的一擊；終于導致失敗的因素

his affair was the last straw.

他的風流事是最終導致失敗的因素。

a straw in the wind

a slight hint of future developments

（預示將來發(fā)展的）跡象，預兆，苗頭

straw in the wind

A slight hint of something to come.

某事要來的微弱暗示