The trapped sea lions are in danger of being drowned. 被困在渔网中的海狮有被淹死的风险

270. the fishermen beat out a warning signal.
     渔民们发出了警告信号
271. Time is up.
     时间到了
272. In the confusion, not everyone manages to escape.
     在混乱中 有些海狮没能成功逃脱
273. The trapped sea lions are in danger of being drowned.
     被困在渔网中的海狮有被淹死的风险
274. Pups are separated from their mothers.
     幼崽与母亲被迫分离
275. Then, at the last minute, the fishermen briefly drop their net...
     在最后一刻 渔民们短暂的松开了渔网
276. ..and the trapped sea lions can escape.
     被困海狮得以逃脱

来自《行星地球 第三季 第二集 Planet Earth S03E02 海洋》第 273 行