by all means意思是當然可以;一定，務必;只管;百般
一、當然可以
1、If you can find a use for this old computer, by all means keep it.
如果你覺得這臺舊電腦對你還有用的話，你當然可以留作己用。
2、By all means try the jacket on, but I think it will be too big for you.
當然可以試一下這件夾克衫，但我覺得你穿太大了。
二、務必
1、I told the waiter by all means to bring caviare and the cheapest dish on the menu.
我告訴服務員務必要拿來魚子醬和選單上最便宜的菜。
2、You must realize this plan by all means.
你務必完成這個計劃。
擴充套件資料
同義詞：
一、be sure to
英 [bi: ʃuə tu:] 美 [bi ʃʊr tu]
務必;必定;切;得
1、Be sure to come. Don"t let me down.
你一定來，可別拆我的臺。
2、Be sure to make this point clear to everyone.
務使大家明瞭這一點。
二、without fail
英 [wiˈðaut feil] 美 [wɪðˈaʊt fel]
必定，一定
Take the money to your office without fail, first thing in the morning
早上第一件事是一定要把錢拿到辦公室去。
by all means意思是當然可以;一定，務必;只管;百般
一、當然可以
1、If you can find a use for this old computer, by all means keep it.
如果你覺得這臺舊電腦對你還有用的話，你當然可以留作己用。
2、By all means try the jacket on, but I think it will be too big for you.
當然可以試一下這件夾克衫，但我覺得你穿太大了。
二、務必
1、I told the waiter by all means to bring caviare and the cheapest dish on the menu.
我告訴服務員務必要拿來魚子醬和選單上最便宜的菜。
2、You must realize this plan by all means.
你務必完成這個計劃。
擴充套件資料
同義詞：
一、be sure to
英 [bi: ʃuə tu:] 美 [bi ʃʊr tu]
務必;必定;切;得
1、Be sure to come. Don"t let me down.
你一定來，可別拆我的臺。
2、Be sure to make this point clear to everyone.
務使大家明瞭這一點。
二、without fail
英 [wiˈðaut feil] 美 [wɪðˈaʊt fel]
必定，一定
Take the money to your office without fail, first thing in the morning
早上第一件事是一定要把錢拿到辦公室去。