1. cancel vt.取消，注销; 抵消
例句：The Russian foreign minister yesterday cancelled his visit to Washington
俄罗斯外交部长昨天取消了对华盛顿的访问。

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

3. enforcement n.强制，实施，执行
例句：The doctors want stricter enforcement of existing laws, such as those banning sales of cigarettes to children.
医生们希望加大现行法律的执行力度，如禁止向孩童出售香烟。

4. confront vt.面对; 使面对面，使对质
例句：She was confronted with severe money problems
她面临严峻的资金问题。

5. undermine vt.逐渐削弱; 使逐步减少效力
例句：Incidents like these began to undermine Angleton's credibility.
这一类事情开始损毁安格尔顿的声誉。
 3/5   首页 上一页 1 2 3 4 5 下一页 尾页