自从二十世纪七十年代以来滑板就已存在，但直到最近才又开始流行。

Skateboards have been around since the 1970s, but they have recently become popular again.

youdao

自从二十世纪七十年代以来滑板就已存在，但直到最近才又开始流行。

Skateboards have been around since the 1970s, but they have recently become popular again.

youdao