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。
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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