I recently broke up with my boyfriend. I was really bummed out.
最近我和男朋友分手了。我真沮丧。
They that (or who) live longest see most.
活得最长,见识最广。
Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.