Without rain, these plains can become dust bowls. 由于缺乏雨水 这里的草原变成了黄尘地带
They've been searching for days without a sign. 这些狼虽觅食多日 但一无所获
Without trees, eagles have to nest directly on the ground. 没有了树,鹰只能直接把巢安在地面上
Without its solid platform, they can't hunt the seals they need in order to survive. 没有坚实的冰作为平台, 北极熊就不能猎捕它们赖以生存的海豹
How do the cacti survive without rain? 仙人掌为何能在这个无雨地带生存
Sandstorms like these appear without warning 如此巨大的沙暴出现时毫无征兆
The discovery of life that exists without drawing any of its energy from the sun 生命彻底脱离太阳能量 却依然生存的现象
Without water one might not expect to find any caves, 没有水的地方似乎不可能有洞穴