an empty room; 空房间
a bottle empty of wine; 空酒瓶
territorial sky [air]; 领空
a clear [bright] sky; 晴空
All space-directions are void.; Everything is emptiness. 四大皆空。
Kong Quan 空全
make fruitless efforts; 空忙
make a journey for nothing 空跑一趟
empty a drawer; 空出一个抽屉
Leave two blank spaces at the beginning of each paragraph. 每段开头要空两格。
a vacant room; 空房
blank line; 空行
Leave a little more space between the rows. 各行之间多留点空儿。
Fill the blank spaces with right words. 用正确的词填空。
I'm busy today. Let's talk about it some other day. 今天没空儿,改日再谈吧。
Are you free? 你有空儿吗?
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)