both predator and prey are effectively blind, 猎食者和猎物都丧失了视力
The males close in on the mother from both sides, 两只雄雪豹从两侧接近雌雪豹
they have had to adapt both their body and their behaviour in order to survive. 为了生存 他们必须从体型和行为上 充分适应环境
It's small tentacles carry highly developed chemical sensors which can detect traces of both predators and prey. 它的小触手有非常灵敏的化学感觉器, 可以探测到敌人和猎物的踪迹
It's nearest living relatives are squid and octopus which, over evolutionary time, have both lost their shells 它是已经进化到已经没有壳的章鱼和乌贼的近亲
Both shark and tuna feast together 鲸鲨和金枪鱼一起享受这大餐