The bucket integrates the water flow; the level of water in the bucket is a function of the rate of water flow and how long the water has been flowing in the bucket.
吊桶汇合了水流，桶中的水位线就是水流速度以及注水时间的函数。
The combined results from all of these should be identical as having been executed as a single bucket by a single map function. The general form of the map function is.
合并的结果值就会如同是单个Map函数在单个“桶”上完全一致。
Using the hash function, each row is put in a bucket with other rows that have the same hash value.
通过哈希函数，将具有相同哈希值的行放在一个bucket中。
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