There's safety in numbers. 数量越多越安全

173. Grouse from all over the desert visit this oasis,
     沙鸡从四面八方飞来这片绿洲
174. arriving together in large flocks,
     在这里集结成群
175. and that is important.
     这十分重要
176. There's safety in numbers.
     数量越多越安全
177. The male snatches a drink,
     雄沙鸡抓紧时间喝了口水
178. but he also needs to collect water for his chicks.
     但他还要给雏鸟们带水回去
179. Using specially adapted breast feathers,
     他胸前特化的羽毛

来自《行星地球 第二季 第四集 Planet Earth S02E04 沙漠》第 176 行