With some very strong regional accents, there is a tendency to replace 'th' with a 'ff' - "through" may sound like "froo".

有的地区口音很重，他们倾向于将th替换为ff，比如将through念为froo。

youdao

With some very strong regional accents, there is a tendency to replace 'th' with a 'ff' - "through" may sound like "froo".

有的地区口音很重，他们倾向于将th替换为ff，比如将through念为froo。

youdao