herb layer

常见例句

双语例句

• Herb layer coverage density was lower and the species fewer.
  草本层的盖度和物种数偏低。
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• The trend of the species diversity index of the herb layer is downward with altitude.
  草本层的物种多样性指数随着海拔高度的升高呈下降趋势。
• In relatively stable stage of undergrowth plants, species and quantities increased, and Chinese fir community formed stable 3-layer structure including Chinese fir layer, shrub layer and herb layer.
  林下植物相对稳定阶段（近成熟林和成熟林阶段） ，种类组成和数量不断增加，群落呈现稳定的杉木层、灌木层和草本层的三层结构；
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