慢速英语:Large Creature Swam the Seas 170 Million Years Ago

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1. examine vt. 检查，调查
例句：He examined her passport and stamped it
他仔细检查了她的护照，然后在上面盖了章。

2. discover vt.发现; 碰见; 撞见
例句：That man will discover the truth.
那个人肯定能弄清真象。

3. fossilize vt.使成化石; 使陈腐
例句：What they seem to want to do in fact is fossilize the particular environment in which people live and work
他们似乎想要做的实际上就是让人们生活和工作的环境固定不变。

4. disappear vi.不见，消失; 不复存在
例句：The black car drove away from them and disappeared
那辆黑色轿车驶离了他们的视线。

5. extinction n.熄灭; 消灭，灭绝
例句：Apes are in danger of extinction
猿类正处于绝种的危险之中。