...A rare water hole. 一个珍贵的水坑

155. they may not have visited for decades.
     数十年前去过的水坑
156. These zebra are almost at the end of their journey.
     这群斑马即将结束旅程
157. This is what they've been heading for...
     这里就是它们的目的地
158. ...A rare water hole.
     一个珍贵的水坑
159. In deserts, most water holes are short lived.
     沙漠里的大部分水坑都转瞬即逝
160. They appear after rains,
     它们在雨后出现
161. but then vanish almost as quickly as they came.
     但以几乎同样的速度消失

来自《行星地球 第二季 第四集 Planet Earth S02E04 沙漠》第 158 行