That's a great drawing of your girlfriend, but you should emphasize the nose a bit more.
你的女友这张画像很漂亮,但你应该把她的鼻子再勾画一下。
It was not forced upon them by the survival competition; they could have caught and lived on prey without using poison, just as the thousands of non-poisonous snakes still do.
毒液不是生存竞争强加给它们的,它们也可以不用毒液捕捉动物而生存,就像今天成千上万的无毒蛇那样。