By all means: In any way possible, regardless of risk or expense; Certainly,absolutely.(spoken) used to say that you are very willing for somebody to have something or do something.
E.G.1: By all means, come to our party if you end up being free on Saturday night!
E.G.2: There will be a lot of people at this event, but we need to court that one big investor by all means.
中文释义：By all means的意思是“一定，无论如何，用一切手段”。例：You must bring him here by all means.（你们一定要设法把他带到这里来。）By all means也可用于回答，表示有礼貌的同意，作“好的”、“当然可以”的意思。例：May I have one?—Yes，by all means.（我可以拿一个吗?——当然可以。）另外引申一个相似短语By no means的意思是“决不”，相当于not at all。例：She is by no means bright.(她一点儿也不聪明。)