In these conditions a diver could easily become disorientated 在这种情况下 潜水员很容易迷失方向 and that could be fatal. 而这将导致送命 The flooded caverns can play tricks on you in other ways. 地下水洞还会以别的方式戏弄你 What seems like air, 这看上去像是空气 isn't. 不对 It's j...
and that could be fatal. 而这将导致送命 The flooded caverns can play tricks on you in other ways. 地下水洞还会以别的方式戏弄你 What seems like air, 这看上去像是空气 isn't. 不对 It's just another kind of water. 它只是另一种水 This is a halocline - 这里是盐跃层 a meeting of fre...
a technique that has been used here, in Mexico, to chart the largest underwater cave in the world - 在墨西哥的这个地方 这种科技被用来 测绘世界上最大的地下水洞 all 100 miles of it. 全长达100多英里 Cave exploration often requires you to push yourself through narrow gaps in th...
all 100 miles of it. 全长达100多英里 Cave exploration often requires you to push yourself through narrow gaps in the rock. 洞穴探险需要不时挤过 一些狭窄的岩石缝隙 Cavers call such places 'squeezes.' 洞穴专家称之为“瓶颈” The tighter the squeeze, “瓶颈”越是狭窄 the greater ...
Cave exploration often requires you to push yourself through narrow gaps in the rock. 洞穴探险需要不时挤过 一些狭窄的岩石缝隙 Cavers call such places 'squeezes.' 洞穴专家称之为“瓶颈” The tighter the squeeze, “瓶颈”越是狭窄 the greater the chance of damaging some vit...
Cavers call such places 'squeezes.' 洞穴专家称之为“瓶颈” The tighter the squeeze, “瓶颈”越是狭窄 the greater the chance of damaging some vital life-support system. 便越有可能损坏一些重要的生存设备 In these conditions a diver could easily become disorientated 在这种情...
It becomes their lifeline - 这成了它们的救生索 literally. 绝对如此 The string also doubles as a measuring tape - 这根线同时也是测量尺 a technique that has been used here, in Mexico, to chart the largest underwater cave in the world - 在墨西哥的这个地方 这种科技被用来 测绘世界上最大的地下水...
literally. 绝对如此 The string also doubles as a measuring tape - 这根线同时也是测量尺 a technique that has been used here, in Mexico, to chart the largest underwater cave in the world - 在墨西哥的这个地方 这种科技被用来 测绘世界上最大的地下水洞 all 100 miles of it. 全长达100多英里 Cave ...
The string also doubles as a measuring tape - 这根线同时也是测量尺 a technique that has been used here, in Mexico, to chart the largest underwater cave in the world - 在墨西哥的这个地方 这种科技被用来 测绘世界上最大的地下水洞 all 100 miles of it. 全长达100多英里 Cave exploration ofte...
When the nearest exit may be hundreds of metres or more away, 最近的出口可能远在 几百米之外或者更远的地方 running out of air down here would be fatal. 在这里 耗尽氧气将是致命的 To avoid getting lost 为了避免迷路 divers carry with them a spool of string. 潜水员必须随身携带一捆轴线 It becomes ...