Close all the water-tight doors.

关闭所有水密门。

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Close all the water-tight doors of the columns.

关闭所有弦柱的密封门。

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Shut the doors and the Windows tight, put on your favorite song, and let your voice ring!

关紧门窗，放上最爱的音乐，让你的声音响起来吧！

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The first, called Ease, is a mere foot in diameter by 16-inches tall and can fly safely in tight spaces or through open windows or doors, thanks to its petite size and ducted rotors.

ENGADGET: CyPhy Works reveals tethered flying bots that can spy on you indefinitely (video)

This is meant to help people park in tight spots where the car can get in, but there is little room to open the doors to allow the occupants out.

ECONOMIST: Rational consumer