1. disease n.疾病; 弊端; 不安
例句：Dirt and disease go hand in hand.
肮脏与疾病是密切相关的。

2. classify vt.分类，归类; 把…列为密件
例句：It becomes necessary to visually classify a large number of samples.
有必要对大量样品进行目测分类。

3. standardize vt.使标准化; 用标准校检
例句：Efforts to standardize English spellings have not been completely successful.
将英语拼写标准化的努力并不完全成功。

4. determine vt.（使） 下决心，（使）做出决定
例句：This examination will determine your final grade. Don't blow it.
考试决定你最后的成绩,不要搞砸了。

5. prevent vt.预防; 阻止; 阻碍
例句：In such wet weather we must prevent the seedlings from rotting.
这样的阴雨天要防止烂秧。


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