A modern variation on the lunch counter is the fast food operation.
在午餐柜台一个现代的变化就是快餐食品的经营。
The process is of easy operation and accurate results with 0.52% coefficient of variation and 99.97% recovery.
该法操作简单，测定结果准确。 该法的变异系数为052％，回收率为9997％。
The process is of easy operation and accurate results with 0.52% coefficient of variation and 99.97% recovery.
该法操作简单，测定结果准确。 该法的变异系数为052％，回收率为9997％。
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