They help enforce it by going to markets, buying salt and testing it on the spot.

她们去市场购买盐当场测试含碘量，以此推动这项运动的实施。

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For example, subsequent studies have later substituted a different mobile for the original to see if the infants can spot the difference, thereby testing whether or not they really remember.

比如，在后续实验用不同的旋转风铃代替了旋转的小车，看看婴儿是否可以分别不同，以此来测试他们是否真的记住了。

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But the findings suggest that testing oxytocin levels could help spot pregnant women at risk for postpartum depression and enable them to get counseling and other care.

但结果表明，检测催产素的水平可能有助于鉴别易患产后抑郁症的孕妇，以使她们能得到心理咨询和其他护理。

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Such is his commitment to breaking the old system that BHP has recently been testing indexed prices by selling iron ore on spot markets at well below contract prices.

ECONOMIST: BHP Billiton ends its pursuit of Rio Tinto

In recent weeks, it has also begun spot checks that allow for more rapid testing.

WSJ: Hong Kong Steps Up Bird-Flu Measures

Princeton Review sits in the sweet spot of America's obsession with testing.

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