VOA慢速英语:Scientists Race to Save World's Coral Reefs

1. prevent vt.预防; 阻止; 阻碍
例句：These methods prevent pregnancy
这些方法能防止怀孕。

2. imagine vt.想像; 想，设想
例句：He could not imagine a more peaceful scene
他想象不出比这更祥和的景象。

3. infection n.影响; <医>传染，感染
例句：Infection, especially anaerobic infection, is much more apt to occur.
感染，特别是厌氧感染很容易发生。

4. expel vt.驱逐; 赶走; 把…除名
例句：The headmaster may expel the boy from the school.
校长可能要把那个男孩从学校开除。

5. suffer vi.受痛苦; 受损害
例句：Within a few days she had become seriously ill, suffering great pain and discomfort
几天的时间，她就病得很严重了，疼痛难忍，周身不舒服。

6. survive vi.幸存，活下来
例句：Those organisms that are most suited to the environment will be those that will survive
最适宜该环境的微生物将会存活下来。