慢速英语:Space Tourism and Business Looking Up

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1. attemp vt.尝试; 试图
例句：The only time that we attempted to do something like that was in the city of Philadelphia
只有在费城那次我们曾试着做那样的事。

2. contract vt.签合同; 缩小; 感染
例句："Smith would like to contract in on this project, if he may."
如果可能的话，史密斯愿意签订合同参加这项计划。

3. chase vt.追求; 追捕; 追寻
例句：She chased the thief for 100 yards
她追了窃贼100码远。

4. invest vt.投资; 花费
例句：They intend to invest directly in shares
他们打算直接投资股票。

5. exploration n.探测，勘探，探险
例句：A big program of oil exploration has begun offshore.
一个大规模的石油勘探计划正在近海展开。