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等级系统中的基本单位是群丛。
The fundamental unit of the hierarchy is the association .
youdao
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把一个生物群丛作为一个系统来看到至少有两个好处。
Viewing a biological association as a system has at least two advantages.
youdao
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把一个生物群丛作为一个系统来看到至少有两个好处。
Viewing a biological association as a system has at least two advantages.
youdao