他说：“我从未故意将任何病人置于不必要的风险境地。”"I have never knowingly exposed any patient to needless risks," he said.为什么我们要为酒吧和宾馆不必要的暖气开支买单呢？Why do we pay to overheat pubs and hotels?对鲸的野蛮屠杀既不必要也不人道。The barbaric slaughter of whales is unne...
The traditional herbicide is still dominating the present agrochemical market.在目前的农药市场中,传统除草剂仍是除草剂市场的主体.The green agrochemical contains light - sensitive pesticide, trans - gene pesticide , biopesticide, etr.绿色农药包括手性农药 、...