Drop me a line when you get there.

你到那儿后给我写封信。

《牛津词典》

Drop us a line, it's always great to hear from you.

给我们写封信，能收到你的信总是让人很高兴。

《柯林斯英汉双解大词典》

I've been out of touch with most of my old friends, only one or two still drop me a line occasionally.

我已经和我的大多数老朋友失去了联系，只有一两个还偶尔给我写信。

youdao

He defended the decision to drop front-line spinner Sulieman Benn in marked contrast to England's thinking.

BBC: Strauss confident of Trinidad win

Italy were not going to lie down and forced a goal-line drop-out.

BBC: Gareth Thomas scores on Wales debut in loss to Italy

Sam Burgess set up Newton for the opening try but Huddersfield replied by piling on the pressure, three times forcing Michael Platt into conceding goal-line drop-outs.

BBC: Bradford 38-12 Huddersfield