The outbreak came to global notice in late April 2009, when Mexican authorities noticed an unusually large number of hospitalizations and deaths among healthy adults.

2009年4月下旬，墨西哥当局注意到健康成年人中有异常多的人住院和死亡，疫情引起了全球的注意。

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In late April, WHO announced the emergence of a novel influenza a virus.

在4月下旬，世卫组织宣布出现一种新的甲型流感病毒。

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Three attacks occurred on successive days in late April, when more than 50 children were injured.

在四月下旬，3天内连续有3起此类事件连续发生，超过50名小学生在事件中受伤。

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It passed in the upper chamber, 68-31, in late April with bipartisan support.

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The company in late April warned that results would be bad, and they were.

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Destructive tornadoes and severe storms tore through the South in late April, killing hundreds of people.

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