originally

This historic library was originally built as a private mansion in the 18th century.

(Chinese) 这座历史悠久的图书馆起初是在18世纪作为私人宅邸建造的。

The plan was originally to go camping, but we decided to stay in a hotel due to the rain.

(Chinese) 起初的计划是去露营，但因为下雨我们决定住酒店。