眼神放空
把「沒有人在裡面」搬到表情上：人看著你，可是後面沒有正在運轉的念頭，像一間沒人住的房子。
blank expression · adjective · B2
showing that someone does not seem to be thinking about anything — used about a look, stare, or face.
茫然的
核心畫面
Picture a room with the door open and nothing in it: no one is using it, and anyone could walk in. The word says 'empty and free' — not broken, not closed, just unoccupied. Point it at a job and it means the post is open; point it at a face and it means nobody seems to be at home behind the eyes.
可以想成：一個房間門開著，裡面空空的，沒有人在用，誰都可以走進去。這個字說的是「空著、而且是可以用的空」——不是壞掉…更多收起
可以想成：一個房間門開著，裡面空空的，沒有人在用，誰都可以走進去。這個字說的是「空著、而且是可以用的空」——不是壞掉，也不是關起來，就只是沒有人佔著。把它指向一份工作，意思是這個位子開著；指向一張臉，就是眼睛後面好像沒有人在。From the picture
Also in this word
empty · adjective · B2
empty and available for someone to use — used about a seat, room, building, or piece of land.
空的；空著的
unfilled job · adjective · B2
available for someone to start doing — used about a job or position in an organization.
空缺的
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
vacantadj/ˈveɪkənt/
- 1
Not occupied; empty.
- a vacant room
- a vacant consulate
- 2
rareNot present; absent.
- And Pierre felt that never, never would he be able to embrace Isabel with the mere brotherly embrace; while the thought of any other caress, which took hold of any domesticness, was entirely vacant from his uncontaminated soul, for it had never consciously intruded there.
- 3
Blank.
- a vacant page
- 4
Showing no intelligence or interest.
- a vacant stare
- a vacant look in her eyes
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。