translation.en: And this picture here, it's really interesting, it shows two things: First of all, it's in black and white because the water was so clear and you could see so far, and film was so slow in the 1960s and early 70s, you took pictures in black and white.
translation.zh: 这张照片 很有意思，它显示了两点。 首先，它是黑白的 因为水是如此清澈 你可以看得很远 曝光很慢 那是六十年代和七十年代早期 照片都是黑白的