many hunter-gatherers gave up their nomadic lifestyles 许多猎手和采集者放弃了游牧生活
to feed many over the winter months. 让集体有足够的食物度过数月的冬天
But finding enough food to feed many mouths... 但是为众多家族成员找到足够的食物
Down here, during the Ice Age, our cousins faced many new challenges. 在冰河时期 我们的表亲在这里面临许多新的挑战
had left many of Earth's great habitats free for the taking. 使地球上许多重要的栖息地 变得唾手可得
The hummingbirds outmaneuver many of their insect rivals. 蜂鸟比许多昆虫对手更灵活