Water vapor is a normal constituent of the atmosphere.
水蒸气是大气的正常组成部分。
Garden plants are important constituent parts of urban ecological environment and have many functions such as atmosphere purification, urban environment improvement etc.
园林植物是城市生态环境的重要组成部分，具有净化空气、改善城市生态环境等多种功能。
While not a major constituent of Neptune's atmosphere, methane is responsible for the planet's blue hue.
尽管甲烷不是海王星大气的主要组成成分，但该行星的蓝色色彩是由甲烷造成的。
A colourless, odourless, tasteless gas, it makes up 78% of Earth's atmosphere and is a constituent of all living matter.
无色、无臭、无味的气体，占地球大气的78%，也是所有生物体的组成部分。
Carbon dioxide is a minor but important constituent of the atmosphere, averaging about 0.03% or 300 PPM by volume.
二氧化碳是空气的含量较小但很重要的组成成分，体积比平均约为0.03%或300ppm。
Carbon dioxide is a minor but important constituent of the atmosphere, averaging about 0.03% or 300 PPM by volume.
二氧化碳是空气的含量较小但很重要的组成成分，体积比平均约为0.03%或300ppm。
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