Air castle
n. 空中楼阁，妄想，想入非非的计划
🧩 词语组成解析
air
[ɛə]
n. 天空;气氛;空运;（简单易记的）曲调;
vt.& vi. 晾晒;烘干;播送;广播;
vt. 使房间通风， 透气;
castle
['kæsl]
n. 城堡，堡垒;象棋中的车;
vt. 把…置于城堡中;（下国际象棋时）用车护（王）;
🗣️ 情景例句
The birthday dinner was held at a five-star restaurant.
生日宴会在一个五星级的宾馆里举办。
No problem.
没问题。
Heavy iron chains around his feet and hands were fixed to a metal bar that ran round the hall about ten centimetres off the ground.
手上和脚上沉重的铁链拴在厅堂四周离地约有10厘米的金属杆上。