/spɑːs/
only present in small amounts or numbers and often spread over a large area 稀少的；稀疏的；零落的
the sparse population of the islands
那些岛上零星的人口
Vegetation becomes sparse higher up the mountains.
山上越高的地方植物越稀少。
The information available on the subject is sparse.
这个题目资料匮乏。