It cost him several years to compile this encyclopedia.

编纂这部百科全书花了他好几年时间。

youdao

FIFTY years in the making, this encyclopedia of "firsts" is a gem of a book, amusing and informative.

这本“第一”的百科全书是书中珍品，历时50年完成，内容丰富有趣。

youdao

FIFTY years in the making, this encyclopedia of "firsts" is a gem of a book, amusing and informative.

这本“第一”的百科全书是书中珍品，历时50年完成，内容丰富有趣。

youdao