At a few places, inclusions can be seen to be derived by dismemberment of partings.在少数地方可见到由夹层肢解而成的包裹体....the dismemberment of Pakistan and the creation of Bangladesh in 1971.1971 年巴基斯坦的分裂和孟加拉国的建立He committed a serious o...
Coil the fibre into a helix.将纤维卷绕成螺旋形。Normal, double - helix DNA is spiral, like a loosely coiled spring.正常的双螺旋DNA是螺旋形的, 像一根松松地卷曲的弹簧.The helix makes a complete turn every 3.6 residues.每个3.6个残基,螺旋正好转一圈....