科学家们正试图将天文学中的各派观点整合在一起。Scientists are trying to pull together disparate ideas in astronomy.总的说来，航空企业很好地促进了天文学的发展。Speaking generally, the space enterprise has served astronomy well.我们很快就将迎来天文学的新纪元。We are on the threshold ...
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...