by all means 一定；务必
by any means 无论如何
by no means 绝不
例句：
By all means,I must visit my sick friend.
我一定要探望我生病的朋友。
You must get there by all means before dark.
你们一定在天黑之前到达那里。
A:Could I borrow your pen,please?
我可以借用你的钢笔吗？
B:By all means.
当然可以。
背景音乐：
soulchef-drafting in a daydream
