英语语法分析

The Sahara is a sandy desert with great sand hills.

撒哈拉沙漠是一个沙质沙漠，有很多沙丘。

Even before the drought, the Sahara was never well watered.

即使在变得干旱之前，撒哈拉沙漠也从未得到充分的灌溉。

Warm clothes and a blanket are necessary for our survival in the Sahara.

暖和的衣服和毯子是我们在撒哈拉生存所必需的。