今天晚饭不吃了，我想再瘦点。
Mr Xu: You are so thin that no need to be more slim. Aren’t you afraid that you will hold the wall when farting?
你都瘦成那样了，还减什么啊!你不怕放屁扶着强啊?
Felian: What’s meaning of “hold the wall when farting”?
什么叫放屁扶着墙?
Mr Xu: It means that a person is too thin to have force when farting, so she must hold the wall.Otherwise she will fall in a faint.
就是人太瘦了，连放屁的力气都没有力气了，所以就得扶着墙，要不该晕了。
Felian: Haw-haw!That will be very funny, if it’s really true!
哈哈!要真是这样，当时的状态岂不是很搞笑。
Mr Xu: Just thin like you!You have to hold the wall if you eat noting only for three days.
像你这样的，三天不吃饭就得扶墙了!
Felian: Don't mention three days.I will see stars just for skipping one regular meal and I will hold the wall when farting!
别说三天了，我一顿不吃就眼冒金星，放屁扶着墙了。
Tony: This is similar to the rocket launch theory that you will be launched out because of your light weight when farting!
这个也符合了火箭发射的原理。一放屁，因为太瘦了，人就发射出去了!
Felian: This theory which is due to a fart is just like a theory which is due to an apple.
这是一个屁引发的理论，就像一个苹果引发的理论一样。