互花米草、狐米草和大绳草的表皮均由长细胞、短细胞（栓质细胞和硅质细胞）、盐腺和气孔器组成。
The epidermis of culm of S. alterniflora, S. patens and S. cynosuroides is all made up of long cells, short cells (cork cells and silica cells), salt glands and stomatal apertures.
栓得这样短的话甚至会使一匹受过良好训练的马去拉拽绳子。
Tying this short could cause even a well-trained horse to pull.
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