The worst thing you can do is place conditioner above your crown line. This will lead to grease and unnecessary oil production.

你最不应该做的就是把护发素抹到头顶。这会产生不必要的油脂。

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The emulsion sampling technique had been applied to flame atomic absorption spectrometry to determine successfully zinc and lead in lubricating grease.

将乳浊液进样技术应用于火焰原子吸收光谱法，成功地测定了润滑脂中锌和铅。

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