1. suicide n.自杀; 自杀行为; 自杀者
例句：Her suicide was motivated by desperation.
她自杀的诱因是自暴自弃。

2. decrease n.减少，减小; 减少量
例句：The decrease in unemployment was 30 percent.
失业人数减少了百分之三十。

3. convince vt. 使相信，说服，使承认
例句：I could not convince him no matter how hard I tried.
无论我如何努力,也说服不了他。

4. suffocation n.窒息
例句：The room was hot to suffocation.
房间热得闷人。
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