Some years, no chicks survive in this colony. 有几年中 没有一只雏鸟幸存

247. ..unless they can get out of the water.
     否则它们将很快夭折
248. The adults are unable to help.
     成年火烈鸟们也爱莫能助
249. A chick must save itself.
     雏鸟只能自救
250. Some years, no chicks survive in this colony.
     有几年中 没有一只雏鸟幸存
251. Our coasts are vulnerable places.
     我们的海岸十分脆弱
252. Increasingly so, as rising global temperatures create bigger storms.
     随着全球气候变暖引发更大的风暴 这种情况越来越严重
253. The biggest are hurricanes.
     最大的风暴要数飓风

来自《行星地球 第三季 第一集 Planet Earth S03E01 海岸》第 250 行