乱七八糟的,看官方呗:
Turn on your taps. "There's pressure built up in the pipes, and if the water's not moving and that pipe is exposed to cold, then it could freeze," said Suppa. "So what you'd need to do -- or what you could do -- is you open up the faucet a little bit.
"The water's moving, and because the water's moving, it's not going to freeze as rapidly as it could have if it was just sitting in the pipe." He suggested opening faucets about one-quarter of the way to help relieve pressure in the pipes.
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