I wanted to be part of that, and I kind of sat around at the edge going, "Hoo hoo!"  Now, incidentally, what they were laughing at was a song which people used to sing, which was based around signs in toilets on trains telling you what you could and could not do in toilets on trains.
我想成为他们中的一个， 然后我就围坐在边上 跟着那样，“唬唬！” 顺带一提，他们笑的是 一首人们常唱的歌， 那是根据火车上 厕所里的标语写成的歌 旨在告诉你，在火车上的厕所里 哪些事能做，哪些不能做。