he can now set off on the long journey home. 他开始漫长的归家旅程

186. This is why sandgrouse nest so far from water holes.
     这就是沙鸡巢离水坑如此远的原因
187. At last, he's soaked up as much as he can.
     终于 他吸足了水
188. Carrying a quarter of his body weight in water,
     带着自身体重四分之一的水
189. he can now set off on the long journey home.
     他开始漫长的归家旅程
190. He's back, and just in time.
     到家了 时间刚刚好
191. He can give the chicks their first ever drink.
     雏鸟可以喝上第一口水了
192. But he will have to undertake this perilous journey every day
     但在未来两个月 他依然每天都要

来自《行星地球 第二季 第四集 Planet Earth S02E04 沙漠》第 189 行