nonvenomous

例句:

• Nonvenomous snakes either swallow prey alive or kill by constriction.
  来自BBC
• Nonvenomous snakes leave skin tears that may be treated like scratches.
  被无毒蛇咬的伤口可以像擦伤一样治疗.
  
• Most species are nonvenomous and those that have venom use it primarily to kill and subdue prey rather than for self-defense.
  来自BBC