多氯化联苯在土壤中, 水中或空气中都无法分解, 只会继续累积.PCBs don't break down in soils, water or air, but carry on accumulating.建立了HPLC测定联苯菊酯含量的方法.An HPLC method for the determination of bifenthrin emulsifiable concentrates was developed.介绍...
She balled the handkerchief up and threw it at his feet.她把手绢揉成一团，丢在了他的脚边。He pulled a handkerchief from his pocket and gave it to him.他从口袋里掏出手绢递给他。He took out a handkerchief and blew his nose.他掏出一块手帕，擤了擤鼻子。...