She is sleeping here so she won't have to travel from Riverdale in the morning.
她晚上住在这儿,免得早上从Riverdale赶过来。
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。