1. increase vt.增加，增大，增多
例句：The population continues to increase
人口继续增长。

2. consider vt.考虑; 认为
例句：I consider that it was a very good film
我认为这是一部很好的影片。

3. appear vi.发表; 出现，显现
例句：They appear to be very sensitive to mildly corrosive environments.
它们似乎对轻度的腐蚀环境非常敏感。

4. 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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