“mostly covered”可以造什么句，mostly covered造句

Until now, the quotas mostly covered alloys and oxides with a rare earth content of at least 50 percent.

The urban area in the eastern China region is mostly covered by the relatively thick loose Quaternary deposits, below which, in many cities, there exist many considerably large buried faults.

During glacial ages that exist about 90% of the time, our Northern Hemisphere is mostly covered with ice up to several miles thick.

ice covered waters surrounding the North Pole; mostly covered with solid ice or with ice floes and icebergs.