negative mutant负: burden; load突变: sudden change; change sudden ...株: root and stem of a tree abov ...dna负突变株: dna-negative mutant突变株: mutant strain下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:负突变株，即可在微信中查询翻译
