借助hash索引，可以通过为记录生成一个hash值，然后根据这个hash值在文件中查找该记录，从而在固定的时间内在给定的文件中找到一条记录。
With a hash index you can find a record in a given file in constant time by generating a hash value for the record and then looking up the record in the file based on that hash value.
算法具有多边形约简算法相同的优良的近似质量，并可在固定数据缓冲区空间内在线运算。
The quality of approximation is as good as polygonal boundary reduction, and it can process the data online in a constant buffer.
在周期内各种内在风险固定的情况下，我们应该考虑可能出现的各种类型的夸大或保守性错误陈述。
We should consider the types of overstatements or understatement error that are likely to occur given the inherent risks of the cycle.
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