We're going to go on a dive to the deep sea, and anyone that's had that lovely opportunity knows that for about two and half hours on the way down, it's a perfectly positively pitch-black world.
好了，我们即将潜入海底深处。 任何一个有过这种美妙机会的人都知道 在这两个半小时的下降过程中， 是一个完全漆黑的世界。