放屁的时候怎么说英语

When you want to express the act of farting in English, you can use the phrase "to fart" or "to let out a fart." For example:
"I need to go find a private place to fart."
"Excuse me, I just let out a fart."
It's generally considered impolite to talk about farting in formal situations or around people you don't know well. In casual settings, however, it's not uncommon for people to make light-hearted jokes or references to farting.
Note: Farting is a natural bodily function, and it's completely normal to do so. However, it's important to be mindful of others and try to be considerate when farting in public or around other people.