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来源:雅诚德英语网
The ecologist is concerned primarily with the quantities of matter and energy that pass through a given ecosystem, and with the rates at which they do so.
生态学家主要关注的是流经某一生态系统的物质和能量的量以及它们的速度。
The ecologist is concerned primarily with the quantities of matter and energy that pass through a given ecosystem, and with the rates at which they do so.
生态学家主要关注的是流经某一生态系统的物质和能量的量以及它们的速度。