未完成；未核实

v.未完成，未核实; 悬空

up in the air───悬而未决

castle in the air───空中楼阁；白日梦

sting in the tail───（尤指令人不快的）意外结局；唱片名（StingintheTail）

have in the wind───追踪

castle in the airs───空中楼阁；白日梦

castles in the air───n.空中楼阁（等于aircastle）；不可能实现的计划，幻想；白日梦

fan the air───扑空；打空

EVEN when the sky is blue over Quincy, clouds hang in the air.───虽然昆西天空一片蔚蓝，但也挂几丝乌云。

The words hang in the air.───他的话弥漫在空气当中，凝固了。

He seemed to hang in the air above the old man in the skiff.───它仿佛悬在空中,就在小船中老人的头顶上空.

The president leaned back to let that thought hang in the air for a moment.───总统向后靠了靠,好让这种在阿尔巴托夫的脑际萦绕片刻.

Of course, a dancer can't really hang in the air.───当然，一个舞者不可能真正地在空中悬着的。