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The pollution of nitric oxide and the method of denitration were introduced.是什么意思？

The pollution of nitric oxide and the method of denitration were introduced.

介绍了氮氧化物排放污染的危害以及氮氧化物控制的方法.

相关词汇
the pollution of nitric oxide and method denitration were introduced

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

pollution

n. 污染（作用），腐败，堕落，沾污；

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

nitric

--

oxide

n. [化]氧化物；

and

conj. 和，与，而且，于是，然后，因此；

method

n. 方法，条理；

denitration

n. 脱[去，除]硝；

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

introduced

adj. [医]引种的，引进的；v. 提出( introduce的过去式和过去分词 )，介绍，引进，作为…的开头；
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他坐在那儿，听我陈述解雇他的理由。
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一份耕耘，一份收获。
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