translation.en: But no one had actually gone down into the actual site of the boundary of creation as we call it -- into the Rift Valley -- until a group of seven of us crawled in our little submarines in the summer of 1973, 1974 and were the first human beings to enter the Great Rift Valley.
translation.zh: 但没有人能真的下去， 进入那个撕裂的边界的现场 进入我们称为大裂谷的地方—— 直到1973年和1974年的夏天，我们一行7人爬进小潜艇， 于是，我们成为进入大裂谷的第一批人。