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Have there been previous swine flu outbreaks ?

以前有过猪流感爆发吗？

That is about 8 outbreaks per year .

每年有8起疾病爆发事件。

Elsewhere there have been outbreaks of measles .

其他一些地方则爆发了麻疹。

But frustration has led to frightening outbreaks of anger against multinationals .

但失望已导致了针对跨国公司令人生畏的愤怒情绪爆发。

It even allows it to forecast outbreaks of insect-borne diseases such as malaria .

该系统甚至还被用于预测疟疾等病虫害的爆发。