We've only gone back two years in the bit bucket.
我们只查近两年的信息存储。
The water is dumped out into a pool, and then the empty bucket (because it is weighted at the bottom) tips back to the upright position and begins catching water again.
桶里的水倒在一个池子里,而之后空桶翻回到直立位置并且又一次开始蓄水。
You can easily demonstrate the first way by filling a bucket with tap water and leaving it on the back porch for several days.
你通过在桶里装水,并放在避光处几天来证明水的第一个变坏途径,阳台数天。
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