News Link: Scientists discover Earth has two cores (Level 5)
1.mantle(n.) : 覆蓋層
eg : We watched the building vanish under a mantle of thick smoke as the fire swiftly moved through it.
大火迅速蔓延,我們看到大樓被滾滾濃煙吞噬。2.geophysicist (n.) : 地球物理學家
eg :These two erupting fissures shared the same magma chamber, according to geophysicists. 距地球物理學家稱,這兩個噴發的裂縫共享同一個岩漿房。
3. adius (n.) :(圓或球體的)半徑,半徑長度
eg : The station, shopping centre and school lie within a one-mile radius of the house.
車站、購物中心和學校都在距這所房子一英里的範圍之內。