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- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- 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。
- The density of population in this city is very high. 这个城市的人口密度非常高。
- Ammonia nitrogen density 氨氮浓度
- Nitrogen density 氮密度
- The area had a population density of five people per square mile. 该地区人口密度为每平方英里五人。
- Plant density have higher effect on ear characters than nitrogen application. 密度比施氮量对果穗穗部性状的影响更大些。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- The density goes down exponentially with height. 分子密度随着高度的上升而指数衰减。
- The population density is evened out. 种群密度亦趋于均匀化。
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- Sample gas tubes are flushed with nitrogen. 采气管得用氮气吹扫。
- Density exceeded 100 nests per mile. 丝巢密度超过每英里100巢。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存库是大气层。
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- Do you know the density of population in this area? 你知道这个地区的人口密度吗?
- Fast neutrons are also captured by nitrogen. 快中子也可以被氮吸收。
- This wave of excess density is sound. 这种过剩密度的波就是声波。
