我设法偷偷地打开包裹的一角。

I managed secretly to undo a corner of the parcel.

《柯林斯英汉双解大词典》

我打开包裹取出书来。

I undid the package and took out the books.

《牛津词典》

我坐在椅子上打开包裹，当时他就站在我身后。

I sat on the chair to unwrap the package while he stood behind me.

《柯林斯英汉双解大词典》

You break the seal between them and feel the thing get cold, for example, right.

如果你买了制冷或加热包,你打开它们之间的封条。

麻省理工公开课 - 热力学与动力学课程节选