求翻译：The training materials are paperless.It started in April.At the same time,the city's CDC will take measures to prevent health problems from April.是什么意思？

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悬赏分：1 - 离问题结束还有

The training materials are paperless.It started in April.At the same time,the city's CDC will take measures to prevent health problems from April.

问题补充：

匿名	2013-05-23 12:26:38 无纸化的培训教材。它开始在 April.At 中的同时，市疾病预防控制中心将采取措施，防止从 4 月的健康问题。

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