For each activity, it provides the ability to hook in before and after invocation of the service method. The invocation life cycle is.
对于每个活动，它在服务方法调用之前和之后提供hook能力。
From the information given in the table calculate the specific activity of the enzyme solution after each purification procedure.
根据表中信息，计算每个纯化步骤酶的比活力。
The enzymatic activity of liver and fat tissue of rats in each group after feeding 1 week.
喂饲1周后各组大鼠肝脏和脂肪组织酶活性。
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