This was a seven-week cruise, and this is us, having made our own maps of about 75,000 square kilometers of the seafloor in seven weeks, but that's only a tiny fraction of the seafloor.
７週間の航海でした 約７万５千平方キロに及ぶ― 海底の地図をたった７週間で 独自に作成しましたが これは海底のほんの一部分です