我让马低下头啃吃春天的青草。I let the horse drop his head to crop the spring grass.如果不去动的话，冬萝卜会在春天开花结籽。If unused, winter radishes run to seed in spring.春天，草地上开满了黄水仙。In the spring, the meadow is a mass of daffodils....
氯氟甲烷主要使用在气溶胶喷雾罐和作为冷冻剂.The chlorofluoromethanes are used principally in aerosol spray cans and as refrigerants.在那里, 较冷的空气使冷冻剂冷凝,并在此过程中变热.There, cooler air condenses the refrigerant and becomes heated during the process.氢是...