Instead,the job is done by forty cute, little wooly lambs.

VOA: special.2009.07.14

Wooly Willy It turns out these are really hard to find in the 21st century.

，Wooly，Willy？,在21世纪很难发现这些东西了。

哈佛公开课 - 计算机科学课程节选

Wooly Willy It turns out these are really hard to find in the 21st century.

，Wooly，Willy？,在21世纪很难发现这些东西了。

哈佛公开课 - 计算机科学课程节选