21-01-28 表达 frozen to the core 用来形容 人感觉极其寒冷。其中，to the core 的意思是 彻头彻尾的，极其，所以，frozen to the core 就突出表达了 某人从头到脚、浑身冰冷的感觉。这个表达通常和感官动词 feel或系动词 be 连用，即 feel frozen to the core 或者 be frozen...

16-06-02 Earths magnetic field shields us from deadly cosmic radiation, and without it, life as we know it could not exist here. The motion of liquid iron in the planets outer core, a phenomenon called a geodynamo, generates the field. But how it was first c...

15-10-12 There have been many estimates for when the earth's inner core was formed, but scientists from the University of Liverpool have used new data which indicates that the Earth's inner core was formed 1 - 1.5 billion years ago as it froze from the surro...

13-12-30 Massive stars -- those at least 8 times the mass of our Sun -- present an intriguing（有趣的） mystery: how do they grow so large when the vast majority of stars in the Milky Way are considerably smaller? To find the answer, astronomers used the Ata...

11-09-07 Dual-core family refers to a family where both husband and wife are the only child or the single core of their own families before they got married. The new family, of course, has two cores as neither of the couple knows how to behave not as a core...