英语语法分析

The herbicidal activity on dicotyledon weeds is better than on monocotyledon weeds.

对双子叶杂草的活性明显优于对单子叶杂草的活性。

In angiosperms there are 475 species of monocotyledon and 567 species of dicotyledon.

被子植物中单子叶植物475种，双子叶植物567种。

We have built an efficient method to observe the stomata of monocotyledon by improving the traditional one.

通过对传统的植物叶片气孔观察方法的改良，建立了一种观察单子叶植物气孔的有效方法。