尼古丁和可替宁含量低者视为“普通烟民”或“二手烟民”；

those with low levels were considered occasional smokers or people exposed to secondhand smoke;

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研究人员发现，催产素水平低者易在产后两周内发生产后抑郁症。

The researchers found that those who had lower levels of the hormone oxytocin were significantly more likely to develop postpartum depression within two weeks of giving birth.

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色彩的重量感主要取决于明度，明度高者显得轻，明度低者显得重。

Colorific weight feeling basically depends on lightness, lightness is tall person appear light, lightness is low person appear heavy.

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Now to make that lower-of-the-two-prices comment a little bit more rigorous, let's figure out what the demand actually is for these firms.

为了说明两者价格较低者,具体是什么意思,先来解决这些公司真正的需求量是什么

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