1.  nontoxic
2.  innocuous
3.  innoxious
4.  avirulent

• 1. 无毒的: nontoxic | atoxic | innocuous | non-poisonous
• 2. 无毒的家: The Nontoxic Home
• 3. 材料是环保无毒的: Material is environmentally non-toxic | Materials are environmentally friendly non-toxic

更多释义

• 1.为了消除这种杂草，生物学家建议用某种对人类和水生动物无毒的除草剂来处理受感染的部分湖泊。
  In order to eliminate the weed, biologists proposed treating infested parts of the lake with a certain herbicide that is nontoxic for humans and aquatic animals.
  dict.yoduao.com
• 2.比如无毒的蝴蝶，变得与有毒的那些看起来一样。
  Like, non-poisonous butterflies, that have come to look like poisonous ones.
  dict.yoduao.com
• 3.一种完全无毒的蛇家族，王蛇，也进化出了能中和响尾蛇毒液的血清。
  One family of completely harmless snakes, the kingsnake, has also evolved serum that neutralizes rattlesnake venom.
  dict.yoduao.com

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