水培法不是把它们种植在纯净水里，而是在适当混合了营养素的水中。
Hydroponics is not planting them in pure water, in water that has the proper mix of nutrients.
运用示波极谱法对纯净水和空气中甲醛进行测定。
The oscillating polarography was applied to determine the formaldehyde in pure water and air.
结果表明：电渣重熔法生产的A718钢具有高的纯净度和组织均匀性，选用适当的渣系和生产工艺路线，生产总成本有所下降。
The results showed that A718 produced by ESR has a higher cleanliness and structural unity. Taking suitable refining slags and procedures, the total productive cost can be reduced.
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