USAGE NOTE 用法说明: open, close, turn on, and 和 turn off
Use open and close to talk about objects such as doors, windows, or boxes. 门窗、箱子等的开和关用 open 和 close:
It's warm in here — could you open a window? 这里很暖和，你可以开扇窗吗？
Use turn on and turn off to talk about water or gas, or about things that use electricity. 水、煤气或电器之类的开和关用 turn on 和 turn off:
Turn on the TV; there's a good show on now. 开电视吧，现在有好节目看。