rare variety的意思|示意

They're almost all minor workers. There are a variety of intermediate workers - the soldiers are rather rare.

它们几乎所有都是低级工蚁，各种各样的工蚁品种，兵蚁是相当罕见的。

There, in the boundless desert, grows a rare variety of tree called euphrates poplar.

在那浩瀚的沙漠中，生长着一种稀有的树种，叫胡杨。

Earlier in my career, I worked in northwest China for many years. There, in the boundless desert, grows a rare variety of tree called Euphrates poplar.

我年轻时曾长期工作在中国的西北地区。在那浩瀚的沙漠中，生长着一种稀有的树种，叫胡杨。