strangely

The dog was acting strangely, barking at the empty corner of the room.

(Chinese) 那条狗表现得很反常，对着房间空荡荡的角落乱叫。

Strangely enough, nobody seemed to notice that the large painting had been replaced.

(Chinese) 奇怪的是，似乎没有人注意到那幅大画已经被换掉了。