英语语法分析

The different vegetational parts differ in their food qualities: lower down, there are succulent, nutritious leaves; higher up are the harder stems.

植物的不同部位具有不同的食用价值：靠下面的部位是营养、多汁的叶子；上面更高的部位则是更为坚硬的茎杆。

This is the vegetational climate of arctic permafrost regions.

这是北极永冻地区的植物气候。

This paper discusses the principle and basis, the system and unit of vegetational classification in Pingtan county.

本文论述了平潭县植被分类的原则与依据，植被分类的单位和系统。