You will hear a recording. Below is a transcription of the recording. Some words in the transcription differ from what the speaker said. Please click on the words that are different.
你将听到一段录音。下面是这段录音的文字稿，其中一些词与讲话者所说的不同。请点击那些不同的词。
Below about two hundred metres, sunlight fades and hiding places disappear, so deep-sea animals evolved stranger defences. Many are transparent, letting what little light remains pass straight through their bodies. Others are deep blue, a colour that looks black at depth because red light cannot reach there. Strangest of all are creatures with mirrored sides, which reflect the faint glow of the water and so vanish into their surroundings.
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