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Ammonia - air mixtures are quite difficult to ignite.是什么意思？

Ammonia - air mixtures are quite difficult to ignite.

氨与空气的混合气体不易燃烧.

相关词汇
ammonia air mixtures are quite difficult to ignite

ammonia

n. 氨，氨水，氨气；

air

n. 天空，空气，空中，神态，曲调；v. 晾干，通风，公开发表，播送；

mixtures

--

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

quite

adv. 相当，很，非常，确实如此；

difficult

adj. 困难的，难做的，难解的，不易相处的；

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

ignite

vt. 点燃，使燃烧，使激动，使灼热；vi. 点火，燃烧；
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