榆树疏林生态系统是浑善达克沙地的重要组分之一。
Ulmus pumila open forest ecosystem plays an important role in Otindag Sandy Land.
主要元素组分一般是金属，但非金属碳是钢的重要组分。 收藏。
The components of alloys are ordinarily themselves metals, though carbon is an essential nonmetal component of steel.
园林绿地作为城市重要的绿色公共空间，是城市绿地系统的重要组分。
The garden and Greenland, which are the important public green Spaces, are the important components of the urban Greenland system.
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