Query4All.com
放屁
Data generated from past analysis.
https://heho.com.tw/archives/43597
http://wsjkw.jl.gov.cn/zdzt/jkkp/202105/t20210519_8073361.html
https://www.bowtie.com.hk/blog/zh/%E6%94%BE%E5%B1%81/
https://www.commonhealth.com.tw/article/87684
https://baike.baidu.com/item/%E6%94%BE%E5%B1%81/557049
https://helloyishi.com.tw/stomach/other-digestive-issues/3-main-reasons-of-farting/
https://zh.wikipedia.org/zh-hans/%E5%B1%81
https://www.nbmzyy.com/news/874.html
https://www.sohu.com/a/633930414_121124453
https://www.fpg.com.tw/tw/issue/5/249