“drop someone a line"的另一种意思并举例

留下便条
Remember to drop me a line.
记住给我写封短信.
I'll drop you a line.
我会留个便条给你
Drop me a line when you are free.
有空时给我写封短信.
Drop me a line when you get there.
到那里时给我们来封便信.
Please drop me a line whenever you have time.
无论什么时候你有时间,请惠我短信.