be must for的意思

必須

to lust for───渴望

be all for───完全贊同

be good for───有益于；對…有好處

be in for───必定遭到；參加

but for───conj.要不是；如果沒有

go out for───努力爭取；（運動員、運動隊）盡力參加選拔賽

lust for───貪求

It must be worrying for you not to know where he is.───你不知道他的下落一定很著急。

water discharge hole shall be a must for products requiring pickling treatment prior to surface processing.───表面處理前需要酸洗的產品，一定要鉆流水孔！

I find this to be a must for any hunter.───我發現這對獵人來說是必須的。