Dropping in after work for a rap over a beer.

下班后过来喝杯啤酒聊聊天。

I am just dropping in on you from a business trip. / I have come to see you while I am on a business trip.

我是出差搭便来看看大家。

The officials at different levels travelled from one village to another, dropping in on families and listening to their complaints.

各级领导干部从一个村子到另一个村子串门听取群众的意见。

I hope you don't mind me dropping in unannounced.

希望你不介意我不请自来。

A continual dropping in a very rainy day and a contentious woman are alike.

大雨之日连连滴漏,和争吵的妇人一样.

In recent years, an unknown disease has caused the pomelo (Citrus grandis) fruit seriously dropping in Ruili city of Dehong prefecture.

近年来，云南省德宏州瑞丽市柚子因一种不明病害导致果实腐烂脱落。

It's not uncommon to find people dropping in to hang out, use the Internet or let their children play on the Macs on low-legged tables.

常常可见到人们走进来或走出去，使用因特网，或让孩子在低脚桌上玩Macs。

As a line by Li Bai, a great poet in Tang Dynasty goes, "In the Yellow Crane Tower the jade flute is being played while in the River City of Wuhan plum blossoms are dropping in May."

唐代大诗人李白的一句“黄鹤楼中吹玉笛，江城五月落梅花”，使这座中国腹地的特大中心城市自古有着“江城”的美誉。

The minute I dropped out I could stop taking the required classes that didn't interest me, and begin dropping in on the ones that looked interesting.

在我做出退学决定的那一刻，我终于可以不必去读那些令我提不起丝毫兴趣的课程了，然后我可以去攻读那些我喜欢的课程了。

I never began dropping in the middle of a conversation, but a few times when my wife and I got back to the car, I quickly fell asleep during the car ride.

我肯定没有和别人谈着谈着就睡着的经历，不过倒是有几次我坐上车就睡着了。