active zone meaning in English

堆芯
反应段
工作范围
活动层
活动带
活动断层带
活性区
主动区
作用区

Along the elevation gradient or succession series , the activity of alkaline phosphatase increased gradually . besides the surface sediments * alkaline phosphatase of sediments in every vegetation area has higher peak activity and vmax , but a lower km at the depth of 20 - 30cm . lt was proved that there was a remarkably active zone of the alkaline phosphatase in the sediments besides the surface layer
而各植被样带沉积物中碱性磷酸酶活性、 vmax除在表层有一高值以外，各植被样带在20 - 30cm处有一较高峰值，而km值在该处有一较低值，说明除了表层之外，在亚表层有一个令人注意的碱性磷酸酶活跃区。