translation.en: The high seas, where whales, tuna and dolphins travel -- the largest, least protected, ecosystem on Earth, living in dark waters that average two miles deep.
translation.zh: 在远海，鲸鱼、金枪鱼和海豚遨游的地方 也是地球上最大，却受到最少保护的生态系统 平均两英里的黑暗海水里