英语语法分析

Carex frustration had come to think of one side to sit down alone.

苔思只好沮丧地走到一边，独自坐下来。

The average ratio of reflectivity of Carex lasiocarpa wetland is 21.

毛果苔草湿地反射率平均为21。

Carex kobomugi is an important biological species resource with versatile uses.

筛草是一种重要的生物物种资源，其用途广泛。