He had been bitten by a venomous snake.

他被一条毒蛇咬了。

《柯林斯英汉双解大词典》

And he wields the tooth of a venomous snake.

接着他又挥挥手中的毒蛇牙。

youdao

In the darkness, she did not see it was a venomous snake whose tail the trap had caught.

黑暗中，她没有发现有一条致命的毒蛇，它的尾巴被捕鼠器捉住。

youdao

And one group of kids shrieked as a two-foot black snake not venomous slithered across the baseline in the middle of a lesson.

WSJ: The hard reality of teaching tennis

The snake is mildly venomous, the FWS says, but it does not pose a danger to most adults, and its bite will not penetrate clothing.

CNN: Deadly mice to rain down on Guam snakes