如上所述，在上世纪90年代期间，初中是唯一回报率没有提高的教育种类。

As noted above, junior high school was the only level of education that did not deliver increasing returns during the 1990s.

youdao

如上所述，在上世纪90年代期间，初中是唯一回报率没有提高的教育种类。

As noted above, junior high school was the only level of education that did not deliver increasing returns during the 1990s.

youdao