When leaving a room, turn off the lights.

离开房间的时候，把灯关掉。

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If that is not possible, then clean off the equipment and your shoes when leaving.

VOA: special.2009.05.26

The Romans maintained peace, for one thing, by leaving local populations pretty much alone when it came to local customs, religions, and living arrangements.

首先，为了维护和平，罗马人没有过多干涉当地居民,对于当地风俗，宗教，居住安排，给予极大自由。

耶鲁公开课 - 新约课程节选

For days I had dreamed about a huge, white boat floating on a vast body of water, but when my mother took me down to the levee on the day of leaving, I saw a tiny, dirty boat that was not at all like the boat I had imagined.

那些天我总是幻想着一艘,巨大的白船徜徉在宽阔的河上，但当出发那天,妈妈将我带到岸边时，我只看到一只又小又脏的船,完全不是我想的那样，“

耶鲁公开课 - 1945年后的美国小说课程节选

Whether U.S. citizens must pay an exit tax when leaving depends on their assets.

FORBES: High Cost To Go Green: Giving Up A Green Card

Always log out of your social media accounts when leaving a computer, especially a public or school computer.

FORBES: 9 Tips for Managing Your Child's Social Media Presence

Visitors have been warned about the virus and are urged to wash their hands when leaving the hospital.

BBC: Hospital battles against winter bug