常見例句雙語例句The chemistry of the soil-the presence in it of phosphorus, nitrogen and so on-is being degraded.該土壤中磷,氮等化學物質(zhì)的含量也在減少。An aryl-replaced nitrogen heterocyclic compound preparation method belongs to the technical field of organic compound catalytic chemistry.一種芳基取代的氮雜環(huán)化合物的制備方法,其屬于有機化合物催化化學技 術(shù)領域。ip.comThere are many ways such as physics, chemistry, ion exchange, man-made wet land and biology etc. wastewater nitrogen removal. The biological way is used widely now.近年來污水脫氮主要有以下幾種基本方法:物理法、化學法、離子交換法、人工濕地法及生物法,生物法是目前應用最廣泛的方法。權(quán)威例句The fact that people have used industrial chemistry to short-circuit the nitrogen cycle, by making fertilisers out of nitrogen in the air at a rate which greatly exceeds what natural systems can manage, has real environmental effects.ECONOMIST: The global environment 返回 nitrogen chemistry