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- The key pollution indicators are ammonia nitrogen and BOD. 主要污染指标是氨氮和生化需氧量。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Ammonia is a chemical substance. 氨是种化学物质。
- Ammonia is a colorless gas with strong smell. 氨是无色并有强烈气味的气体。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- In some ways, an hydrous ammonia is just as Safe to handle as gasoline. 在某种程度上，无水氨使用起来和汽油一样安全。
- Tests of the manure showed a high ammonia content. 这种肥料经过化验表明氨的含量很高。
- A molecule of ammonia is made up of one atom of nitrogen and three atoms of hydrogen. 氨分子包含一个氮原子和三个氢原子。
- Dilute the ammonia with water before you use it. 使用氨之前用水稀释它。
- The smelling of ammonia brought himaround. 嗅氨使他恢复了意识。
- She diluted the ammonia with water. 她用水稀释氨水。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Ammonia has a pungent, penetrating odor. 氨具有一种强烈的刺鼻的气味。
- The ammonia froze into bright crystals. 是氨冻结后生成的明亮晶体。
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- Ammonia is a very reactive chemical. 氨是很活泼的化合物。
- Sample gas tubes are flushed with nitrogen. 采气管得用氮气吹扫。
- They will react with ammonia to form amidines. 它们与氨反应形成脒。
