You're just happy you don't have gills anymore. 你应该庆幸你不会再有鳃。(fetus：胎，胎儿。gill：（鱼等的）鳃。)

174. Joey: That one will.
     这还凑合。
175. Ross: And everyone's telling me, you gotta pick a major, you gotta pick a major.
     每个人都对我说：你得选个专业，你得选个专业，
176. So, on a dare, I picked paleontology. And you have no idea what I'm saying, because, let's face it, you're a fetus.
     于是我鼓起勇气挑了古生物学。可能你不懂我正说什么，我们得面对现实，你还是一个胎儿。
177. You're just happy you don't have gills anymore.
     你应该庆幸你不会再有鳃。(fetus：胎，胎儿。gill：（鱼等的）鳃。)
178. Carol: Look, you don't have to talk to it. You can sing to it if you want.
     你不用老是说话，你也可以对它唱歌。
179. Ross: Oh, please. I am not singing to your stomach, ok?
     噢。拜托，我才不想对着你的胃唱歌！
180. Susan: Hi, how's it going?
     进展如何？

来自《老友记 第一季 第九集 超人狗气球飞走了 Friends S01E09: The one Where Underdog Gets Away》第 177 行