How can I write the esperanto letters with accents ?

如何写出有上标的世界语字母？

He wants to learn esperanto .

他要学世界语。

Bill can 't speak esperanto .

比尔不会讲世界语。

It is to the keyboard what esperanto is to language and betamax to videotape .

它之于键盘就像世界语之于语言和录像机之于录像带。

He knows esperanto and french , to say nothing of english .

他懂得世界语和法语，英语就更不用说了。