首先，他们将三管铬黄曝露在紫外线辐射中，直到其中一管变成巧克力色。

First, they exposed three tubes of chrome yellow to UV radiation until one turned a chocolate color.

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三管轮： 我从这些舱取些油化验，你知道吗。我们将保存这些用于化验。

Fourth Engineer: I must take samples from these tanks. You know, we will keep these for analysis.

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三管齐下，才能成为合格的传播世博精神、塑造世博品质的特许产品生产商。

Qualified with these three advantages, one company can become the qualified franchising product munufacturer for conmunicatingthe Expo spirit and shaping the Expo quality.

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