So that means we're going to have two substances.
这意味着我们有两种物质。
The two substances themselves are arranged in tiny spheres less than 50 billionths of a metre across.
这两种物质分别排列在直径小于50纳米的球体中。
Carrots, mangoes, apricots, pumpkins, and sweet potatoes are brimming with cryptoxanthin and beta-carotene-two substances that reduce the risk for a variety of mental and physical ailments.
胡萝卜、芒果、杏、南瓜、山芋含有丰富的隐黄素和贝塔胡萝卜素——这两种物质能减少患精神和身体疾病的危险。
The two substances are now in contact (with each other), and a chemical reaction is occurring.
现在这两种物质(互相)接触产生了化学反应。
Should the two substances be well stirred, the chemical reaction between them would proceed much faster.
如果把这两种物质很好地搅拌在一起，它们之间很快就能起化学反应。
There were two substances, mind and matter, and they were so dissimilar that an interaction seemed inconceivable.
实体有精神和物质两个，它们极不相似，其相互作用似乎是不可想像的事。
Becke line thin band or halo of refracted light seen under a microscope at the meeting point of two substances that have different refractive indices.
在偏光显微镜下看到的在两种不同折射率物质的交界处出现的细线或光环。
Now there are lots of reports about neurotoxic effect induced by formaldehyde or benzene, but few about neurotoxicity of joint exposure to the two substances.
目前对甲醛和苯的单独毒性作用研究较多，但对于二者联合神经毒性的效应和机制研究较少。
Use of formaldehyde and boric acid as preservatives happens mostly with fresh food, and there is little evidence foods contaminated by the two substances are being shipped abroad.
使用甲醛和硼酸作为防腐剂主要出现在生鲜食品中，没有多少证据表明含有这两种物质的食品流到了其他地区。
Now there are lots of reports about reproduction system function damage induced by formaldehyde or benzene, but few about reproduction toxicity of joint exposure to the two substances.
目前有关甲醛和苯单独作用对生殖系统功能损伤的文献资料较多，但对于二者联合作用所造成生殖毒性的研究还少见报道。
The material relies on two substances: liquid dicyclopentadiene, a common ingredient of plastics, and a catalyst (the researchers 'proprietary secret) that causes dicyclopentadiene to harden.
前者是塑料的普通成分，后者则是研究者的专利秘密，可使二环戊二烯变硬。
The material relies on two substances: liquid dicyclopentadiene, a common ingredient of plastics, and a catalyst (the researchers 'proprietary secret) that causes dicyclopentadiene to harden.
前者是塑料的普通成分，后者则是研究者的专利秘密，可使二环戊二烯变硬。
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