Along with the input string, the SUBSTRING function has three other arguments, which are start position, length, and code unit specification.

除了输入字符串之外，SUBSTRING函数还有其他三个参数，它们分别是：起始位置、长度和代码单元指定。

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Retinal reposition depend on position, length and operation time of scleral rupture.

视网膜复位与巩膜裂伤的位置、长短及手术时间有关。

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Retinal reposition depend on position, length and operation time of scleral rupture.

视网膜复位与巩膜裂伤的位置、长短及手术时间有关。

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