1. 尽一切办法,务必：by air 通过航空途径 | by all means 尽一切办法,务必 | by and by 不久,迟早

2. 当然可以：对不起,我插一句. Sorry for the interruption but | 当然可以. By all means | 怎么都行. Whatever you say.

3. 尽一切办法;一定：may as well 最好,不妨 . | by all means 尽一切办法;一定 . | by means of 用,凭借,依靠 .

adv

1. definitely or certainly

e.g. Visit us by all means