2. beat vt. 打败
例句：At last they beat their enemy.
最终, 他们打败了敌人。
3. approach n. 方法，方式；手段；步骤；态度
例句：His approaches to the problem are wrong.
他处理这个问题的方法是错误的。
4. crowd n. 人群
例句：There were large crowds of people in the street on New Year's Eve.
除夕那天街上有大批人群。
5. retain vt.保持; 保留；止住; 容纳
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