One cold January morning in nineteen eighty-eight, library workers found a small,almost frozen kitten in the book drop.

VOA: special.2009.02.23

Please make sure you drop your library card at the front desk before you leave.

请确保在离开时，把图书卡放在前台。

have to 实战 - SpeakingMax英语口语达人

A book drop is the small metal door in the wall of the building where people can return books when the library is closed.

VOA: special.2009.02.23

Today (tied in with an appearance by CEO Daniel Ek at LeWeb 2011) that's been upgraded, as the freshest preview builds move the Radio section down among the new Spotify Apps, where it now lets you drop in any song from your library for it to automatically create a radio station of similar music around.

ENGADGET: Spotify Radio feature turns into an app, offers Pandora-like stations with unlimited skips

It installed 33 RangeLAN 2 series radio frequency transceivers, or access devices, in the drop ceilings above classrooms, the cafeteria and the library.

CNN: Florida law school uses wireless technology

Drop-in events are being held later at Crowthorne Library and next Thursday at Sandhurst Community Complex.

BBC: Broadmoor