non-venomous       
adjective (also nonvenomous) uk/ˌnɒnˈven.ə.məs/ us/ˌnɑːnˈven.ə.məs/
 无毒液的
A non-venomous snake, insect, etc. does not produce venom (= a poisonous liquid that can be put into another animal's body by biting or stinging).
  Most of the snakes native to the region are non-venomous, but care still needs to be taken. 该地区的大多数蛇都是无毒的,但仍需小心提防。 
 She received a nasty snake bite, but fortunately the snake was identified as being a non-venomous variety. 她被一条蛇凶悍地咬伤了,但幸运的是,这条蛇被确定是无毒的。 
 - More examples
 - Although large and with a hostile appearance, this spider is non-venomous.
 - This family includes a large number of nonvenomous, nocturnal, burrowing snakes which are rarely encountered by humans.
 - It may be non-venomous, but the python is one of the deadliest reptiles on the planet.