1)single cropping,单一种植2)singleness,单一3)single,单一4)unity,单一5)oneness,单一6)simple,单一7)uni-,单，一8)single toxicity,单一毒性9)pollution of single element,单一污染:10)Single pollution,单一污染
用法例句
His plays are characterized by singleness and diversity.
这种 意义表现在他剧作的单一与多元两个特点上。
At present, the land utilization in many cities of China is too single, which does harm to interests of resident and hinder the building of inhabitable city seriously.
目前,我国许多城市土地使用过于单一,损害居民利益,严重妨碍城市宜居。
idellus,and Cd had higher single toxicity than PCE.
