相关单词近义词 unpolluted 未受污染的, pure 纯的, clean 干净的, unadulterated 无搀杂的, antiseptic 杀菌剂, sterilized 无菌的, germ-free 无菌的, untainted 无污点的, uncorrupted 未腐败的, undamaged 未受损伤的反义词contaminated, 受污染的临近词UN, unknot 返回 uncontaminated