Dinucleotide and trinucleotide repeats with similar frequency are the main types, accounting for 89.05% of all the SSRs.

二核苷酸重复和三核苷酸重复是主要的类型，二者出现的频率基本相近，占总ssr的89.05%。

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In this historical background, the merger of local accounting firm has become an important phenomenon, and the scale and frequency of the merger will be getting higher and higher.

在这种历史背景下，本土会计师事务所合并已成为一个重要现象，而且合并的规模和频率将会越来越高。

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Frequency measurement is usually implement by accounting the measured signals and standard signals, thus quantizing error becomes the main source of measuring error.

频率测量一般是通过对被测信号和标准信号计数实现，因此量化误差是引起测量误差的主要原因。

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