GRE全部历史考题，另外还有GMAT。
| mechanism | n.机制；技巧，手法；机械论；机械 |
| mantle | n.地幔；披风 |
| convection | n.对流；传送 |
| subject | adj.易受......影响的：he was subject to bouts of manic depression；dependent or conditional upon：the proposed merger is subject to the approval of the shareholders；服从的；受支配的：ministers are subjected to the law of the land;[定语]臣服的，隶属的 |
| subject | vt.使经受；使遭受：he'd subjected her to a terrifying ordeal；使臣服，使隶属；使服从 |
| implausible | adj.（论点，陈述）似乎无理的，似乎不可能的，不令人信服的 |
| offset | n.弥补，抵消；偏离量，偏离距离 |
| vertebrate | n.脊椎动物 |
| intrigue | vt.arouse the curiosity or interest of; fascinate；vi.make secret plans to do something illicit or detrimental to someone;n. |
| paleontologist | n.古生物学者 |