DDTS造句
DDTs and HCHs serum level were detected by EC - ECD .
运用GC -ECD 方法检测血清中有机氯农药
DDTs和HCHs水平.
In
DDTs the residual level of p, p?
DDTs中p, p?
The residual levels of
DDTs, HCHs in soil were different with different utilization types.
土壤中
DDTs 、 HCHs残留在不同土壤利用方式下有所不同.