A more polite way might be saying " to pass gas."

更礼貌的方式可能是说“放屁” 。

Do you ever pass gas? - Yeah, but I always own it.

- 你有放屁吗？- 是的， 但我一直拥有它。

Graham was interested in how fast the gases pass through the barrier.

格雷厄姆对气体通过屏障的速度有多快很感兴趣。

The change in air pressure had caused them to pass gas en masse.

气压的变化导致它们大量排出气体。

Which he did by passing gases, if you will, through a porous barrier.

如果你愿意的话，他通过让气体通过多孔屏障来做到这一点。

When passing gas, you say " Sorry" , no, " Excuse me" , you say " excuse me" , remember?

放屁的时候， 你说“对不起” ，不，“Excuse me” ，你说“Excuse me” ，记得吗？

It will appear at the precise moment when you pass gas in an elevator, and everyone blames your husband instead of you.

它会出现在你在电梯里放气的那一刻，每个人都责怪你的丈夫而不是你。

Just about anything in the animal kingdom with a rear end can and does fart, and passing gas can have a lot of different purposes.

动物王国中几乎所有有尾部的东西都可以放屁，放屁的目的也很多。