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...
他死于劳累过度引起的心脏病发作。He died of a heart attack brought on by overwork.他可能会因为劳累过度而英年早逝。He might burn himself out and go to an early grave.黑格注意到了他“看上去消瘦，非常劳累”的样子。Haig noted how he "looked pinched and rather tired"....
电子显微学已经革新了对晶体不完整性的研究.Electron microscopy has revolutionized the study of crystal imperfections.粗的晶体不完整性,如孪生体可用肉眼看出.Gross crystalline imperfections like twinning are apparent to the unaided eye.断裂力学虽不是评定结构完整性的唯一标准, 但它起着中心...