Inventors Gene Fein of California and Ed Merritt of Massachusetts came up with the idea.

VOA: special.2009.06.19

I mean it's understandable-- this was before 1879 which was when Red Cliff was founded, and long before Harvard became co-ed.

这是可以理解的-,那是1879年之前，雷德克利夫学院还没成立，远在哈佛成为男女合校之前。

哈佛公开课 - 幸福课课程节选

They're, kind of, like, kind of like, frats and sororities but they're co-ed.

这些俱乐部就像是男大学生联谊会和女大学生联谊会那种性质的，只不过他们是男女生混合的俱乐部。

来普林斯顿吧 - SpeakingMax英语口语达人

And many have. Yet now comes a study showing an increase in the number of injuries in "phys ed" class.

VOA: special.2009.08.06

And some of my classes are co-ed,

有些课程是男女同班的，

高中生活怎么样？ - SpeakingMax英语口语达人

Ed White would leave the protection of the spacecraft and move out into the unknown emptiness of space.

VOA: special.2009.06.24

When he did not obey, Bill Tilghman pulled out his gun and shot Ed Prather two times.

VOA: special.2010.03.10

Ed Whitfield,a Kentucky Republican. and Jim McGovern,a Democrat from Massachusetts.

VOA: standard.2009.03.17

(Speaking) Mikhail Khodorkovsky, the imprisoned Kremlin critic and former head of the Yukos Oil Company, in a recent op-ed column, said Russia's demand for skills in fundamental and applied sciences is declining in light of the appetite for raw materials and corruption.

VOA: standard.2010.02.03