Winter in the mountains returns fast and hits hard. 山里的冬天来得迅猛
Scattering makes it hard for the fox to pick a target. 四散而逃的羊群让赤狐难以选择目标
Newly created and often remote, they're hard for colonists to reach. 由于形成时间晚又常十分偏远 鲜有生命踏足
It rarely rains, so water and food is very hard to find. 由于很少下雨 水和食物都很难获取
This baby sifaka has a hard life ahead of it. 这只幼小的冕狐猴成长之路十分艰辛
The hard rock provides excellent anchorage for communities of great variety and stunning color. 坚硬的岩石 给这些绚丽的共生种群提供了很好的停靠地点
and all across the northern hemisphere the broad leaves are hard at work. 所有北半球的阔叶树木努力生长
With so few prey animals here, life for a hunter is particularly hard. 猎物是如此至少,捕猎对于它们来说是极端困难
It's hard work getting noticed when you go courting in high grass. 在这么高的草丛里面求偶是很难得到关注的