| 1. | Judge by ordinary standards, the core is made of rather dense stuff .
按一般标准衡量，地核是由相当致密的物质组成的。 |
| 2. | The earth's core, at least the outer one is believed to consist of nickel and iron .
一般认为地核至少是外核由镍和铁构成。 |
| 3. | The entire earth may have been melted, and the iron and silicate components separated to form the core and mantle .
整个地球被熔化，铁和硅酸盐分离而形成地核和地幔。 |
| 4. | The earth has a core and a mantle around it
地球的中心是地核,地核的周围是地幔 |
| 5. | It may also have a core , as the earth does
月球也可能如同地球一样有一个地核。 |
| 6. | The earth has a core and a mantle around it
地球的中心是地核,地核的周围是地幔 |
| 7. | He checked them off one at a time as they came in
他们进来时，他一个一个地核对。 |
| 8. | And our plan to fix the core no longer works . so
我们修复地核的计划也不在有效了 |
| 9. | The earth have a core and a mantle around it
地球的中心是地核，地核的周围是地幔。 |
| 10. | Our speed ' s jumped because the density of the core
我们速度飞速上涨是因为地核的密度 |
