农民阶级由农民构成的社会阶级
The social class constituted by peasants.
群丛，结合体在一特定地理区域里由一种或两种主要种类构成的区域的大量有机体
A large number of organisms in a specific geographic area constituting a community with one or two dominant species.
音型一组短而连贯的音符或和弦构成的基本音型，经常为一更大的乐曲或结构构成基础
A brief melodic or harmonic unit often constituting the base for a larger phrase or structure.
铜合金铜与锡、锑、磷或其物质构成的一种合金，含锡，也可不含锡
Any of various alloys of copper, with or without tin, and antimony, phosphorus, or other components.
