易混淆的单词： RARER

Some new activities required rarer skills and were consequently well rewarded .

一些新活动需要较为罕见的技巧，因此得到了丰厚的回报。

And several are even rarer than gold .

有集中甚至比黄金更稀有。

Direct evidence on wage levels is rarer still .

显示薪资水平的直接证据就更少见了。

But such views are becoming rarer .

不过现在持这样意见的人越来越少了。

The earth 's freshwater is even rarer .

地球上的淡水更为稀少。