A gully provides cover. 一条海沟提供了掩护

292. In open water, there's no escape.
     在开阔水域 无处可逃
293. An overhang offers refuge.
     一个凹岩成为避难所
294. But time is running out.
     但是快没时间了
295. A gully provides cover.
     一条海沟提供了掩护
296. Safe
     安全了
297. and able to breathe once more.
     又能呼吸了
298. Mammals had a long way to go to become masters of the world's oceans,
     哺乳动物想要成为海洋的主宰 还有很长的路要走

来自《我们星球上的生命 第一季 第七集 Life on Our Planet S01E07 地球继承者》第 295 行