by all means
1．of course；certainly；definitely当然；必定
I said I would come straight to the point．“By all means，”he replied．我说，我想要直截了当地谈。“当然可以，”他回答道。
2．trying every means possible；at all costs 竭力；务必；无论如何
He will try to get the work done by all means．他会竭尽全力完成那件工作的。
He felt that he should by all means warn his friend．他感到他无论如何要警告他的朋友。