I can't believe what I'm really seeing here. 不敢相信我真的在见证这一切
the puppies can't cope with the sun. 这些幼崽难以承受炎热的阳光
It's risky, but she can't wait any longer. 虽然风险很高 但雌狒狒不能再等了
Without it, she can't produce milk. 没有水 它便无法产奶
..but she can't do that on her own. 但这项工作无法独自完成
But we can't do it alone and we need government and big business 但只靠我们是不行的 我们需要政府和企业
so he can't stay in these chilly waters for long. 因此它不能在冷水里待太久
Termites manage to do what most grass eaters can't, 白蚁与大多数食草动物不同
But they themselves can't digest one bit of it. 可它们根本无法消化叶片
but with swamp under foot, they can't get any traction. 但沼泽太过湿滑 脚底无法借力