Translation of "Wikipedia" in Chinese

What sort of thing is Wikipedia?

“维基百科”是什么东西？

I wouldn't have thought I would someday look up "Viagra" in Wikipedia.

我不会想到有一天我会在维基百科查找“伟哥”。

What do you think was the most read article this year on the Japanese version of Wikipedia?

你认为今年在维基百科上被最多人阅读的日文版本的文章是哪篇？