It shows that the second generation grasses of introduced types have higher production than the local grass,hooked Bristlegrass. 所有引进种再生草的产量都高于当地轮生狗尾草。
This field has been laid under grass. 这块地已经长满了草。
We first trod out a fire in the grass. 我们首先踩灭了草中的火。
