Recently, there was a fossil exhibition at the museum. Many fish fossils were exhibited. Do you know the existence of one kind of fish that would not expire in the air because it couId expel air from lungs? The fossil showed that it began its expansion of territory millions of years ago. All the fossils were exploited by an expedition. There were many experts who had different expertise in the expedition. So the government had an expectation of good results. The research was important, but the expenditure of time and money was also considerable. For example, it was too much of an expense for them to own three helicopters. The experts found a proper mountain. They explored every part of it. After an experimental explosion, one of the experts exploded the gunpowder, an explosive. The explosion was heard a mile away. Several people were injured.The peace breaker could not provide an explicit explanation. In additions his passport was due to expire in two weeks. So he was expelled from the expedition. In spite of many difficulties, the expedition finished the job well.

　　近来博物馆有个化石展览。许多鱼化石展览在那里。你知道一种鱼的存在吗?它不会在空气中断气因为它能从肺呼出气体。化石显示它从几百万年前就开始了它的领土扩张了。所有的化石都是由一支探险队开发出来。这个探险队里有许多学有专长的专家。因此政府对探险有好的收获抱有期望。科研是很重要，不过时间和金钱的消耗也是很可观的。比如，他们拥有三架直升飞机就是很大的消费。专家们找到了合适的山峰。他们勘探了每一片地方。在实验性的爆炸之后，其中一个专家引爆了火药，一种爆炸物。爆炸在一英里外都听得见。有几人受了伤。肇事者无法给出详述的解释。此外，他的护照在两周后期满。于是他被探险队开除了。尽管有许多困难，探险队还是圆满完成了任务。