您要查找的是不是：
- An empty or unoccupied space. [空的]或未被占用的地方
- For a primary key to work well, the field must uniquely identify each row, never contain an empty or null value, and rarely (ideally, never) change. 要使主键正常工作,该字段必须唯一标识每一行,决不包含空值或Null值,并且很少(理想情况下永不)改变。
- An empty stomach is not a good political adviser. 空肚子不是政治上的好顾问。
- He has an empty purse, but a free heart. 他身上没有钱，但心里无忧无虑。
- I feel an empty space inside me. 我感到空虚。
- It's not good to drink on an empty stomach. 空腹喝酒不好。
- An empty space on a document to be filled in. 填空处:文件中留待填写的空白处。
- Full of empty or pretentious language; bombastic. 言过其实的充满空洞或虚假的语言; 吹牛的
- Use an empty crate as a makeshift for a table. 用空板条箱权充桌子。
- He didn't want to retire and lead an empty life. 他不想退休过空虚的生活。
- She crumbled an empty snail shell in her fingers. 她用手指捏碎了一个空蜗牛壳。
- This medicine must be taken on an empty stomach. 这种药必须空腹服用。
- This is an empty space in a worksheet. 这是工作表的空白空间。
- An empty sack cannot stand upright. [谚]空袋子，立不直。
- The condition of being vacant or unoccupied. 空缺空缺的状态或未占的状态
- Path is an empty string ("), contains only white space, or contains one or more invalid characters. path为空字符串("),只包含空格,或者包含一个或多个无效字符。
- Do not exercise on an empty stomach or just after a big meal. 不应空肚做运动,特别紧记要吃早餐,以免体力不支。
- He is looking for an empty lot on which to build his house. 他想买一块空地造房子。
- So please eat your fruits in an empty stomach or before your meals! 所以,请空腹或在饭前吃水果。
- an empty or forsaken place; a wasteland "空旷,荒芜的地方;荒地"
