英语语法分析

The first subzone was first choice to ? ecotourism development.

合理开发区是生态旅游开发的首选地段。

The Lailishan tin deposit is a main deposit type in the western subzone of the western Yunnan tin ore zone.

来利山锡矿床是滇西锡矿带西亚带的一种主要的矿床类型。

The desert plain type can be subdivided into two subzones: the flood plain, subzone and the desert plain subzone.

沙漠平原型又可分为两个亚带，即洪泛平原带和沙漠平原带。