产品畅销不衰，有很好经济效益。

Products are sold briskly , have very good economic benefits.

youdao

它们不是一二年的畅销书籍，而是经久不衰的畅销书籍。

They are not best sellers for a year or two. They are enduring best sellers.

youdao

它们不是一二年的畅销书籍，而是经久不衰的畅销书籍。

They are not best sellers for a year or two. They are enduring best sellers.

youdao