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SCHOOL TIME

Better way to test

作者:TEENS
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US student Gitanjali Rao’s device can help us test drinking water more quickly. TNS

美国少女发明便捷检测水中铅含量的装置。

Lead (铅) is bad for us, even in small amounts. But since we cannot smell or taste it, the only way to find it is with a test.u

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