例句
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Every tonne of coal contains,on average,30 kilograms of nitrogen.
每吨煤平均含30公斤氮。
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If he can combine his ability with hard work, he should be very successful.
如果他能把自己的才能和勤奋结合起来, 必定会很有成就。
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Nitrogen is a gas without colour or smell.
氮是一种无色无臭的气体。
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When two or more elements combine and form a compound, a chemical change takes place.
当两种或两种以上的元素结合形成化合物时, 发生化学变化。
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When an element is caused to combine with oxygen it is oxidized.
当使一种元素与氧化合时，即称其被氧化。
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But if you offered to combine with them I would see no objection.
但是假使你想同他们联合,我并不反对.
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Urea is commonly used as the source of nitrogen in foliage sprays.
尿素作为氮素给源普遍地应用于叶面喷布.
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Nodule bacteria are very good at biological nitrogen fixation.
根瘤菌是生物固氮的能手.
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The effect of nitrogen can be overcome by sheathing the flame in argon.
氮的影响则可以通过用氩气包覆火焰而予以克服.
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In large bowl , combine flours, baking soda and salt and mix well.
将面粉, 小苏打和盐混合放到盆里.