薄的细的用英语怎么说?

"Thin" and "fine" are both used to describe something that is "薄的" or "细的" in Chinese.

"Thin" comes from the Old English word "þynne" which means "narrow, thin, or fine in width."
"Fine" comes from the Latin word "finus" which means "of small size or thin."

例句：

The sheet of paper is thin. (这张纸是薄的。)
The pasta is fine. (这条面条很细。)

Note that "thin" and "fine" can also be used to describe other things, like a person's hair or a liquid's consistency.