1. operate vt.操作; 经营; 运转; 管理
例句：How does this machine operate?
这台机器运转怎么样？

2. attack vt.攻击，进攻，抨击
例句：Can the town be secured against attack?
能保护这个市镇不受攻击吗?

3. extremism n.极端主义; 极端性; 过激论，极端论
例句：The council was often accused of extremism.
人们常抨击该委员会是极端主义。

4. criminal adj. 犯罪的; 刑事的; 可耻的
例句：Criminal groups in general are leagued together against the forces of law.
犯罪集团一般被组成联盟以反对法律的力量。
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