This thesis expounds the causes of geological calamity and region geological calamity forewarning principle.论述了地质灾害的成因和区域地质灾害预警原理.The long - range location and forewarning is the key factor of capturing the initiative in...
Before the race, he is fine. But afterwards he is worn out.赛前他状态很好，赛后就筋疲力尽了。She wondered where they were going to rendezvous afterwards.她想知道之后他们要去哪里约会。Shortly afterwards, cuts in defence spending forced the aerospace ind...
中子和质子构成了原子核.The neutrons and protons form the core of the atom.原子核由中子 、 质子和其他粒子构成.The nucleus of an atom consists of neutrons, protons and other particles.我对原子核物理学一窍不通.I'm out of my depth when it comes nuclear physi...