Empty, empty talk, empty, empty, fantasy, empty, air force, stewardess, air conditioner, ethereal, spacetime, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty, empty. Diabolo, bomb shelter, empty, empty, spacious, empty, unfounded, commonplace, blue sky, unarmed, supercilious, castles in the air.

2、kòng:

Vacancy, blank, empty waste, empty field, vacancy, open space, gap, leisure, hollow, time-consuming, empty, empty, empty garden, empty, empty. Blank point, blank field, blank loophole.