需要更多的调查以分离 SQL 语句，这导致较高的读取/选择比率。
More investigation is needed to isolate the SQL statement(s), which causes the high read/select ratio.
同时，将理论结果和实验结果进行比较，得到了样品中分离铜的有效比率。
Meanwhile, theoretical results are compared with experimental results so that the author can get the effective ratios of separate copper in samples.
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