虚，虗，xu ,从虍( hū)从丘（qiu，从北从一）。虚本谓大丘。大则空旷。故引伸之为空虚。 虚是“墟”的古字，形声。丘的小篆是从北从一，后虚讹变为从虍从业（北）。 大丘也。崐崘丘谓之崐崘虚。古者九夫为井，四井为邑，四邑为丘。丘谓之虚。
Lijia Xu 徐莉佳 ; 作者
Charmaine Xu 艾尚真
Jiao Xu 徐娇
Laurence Xu 劳伦斯·许 ; 劳伦斯
Jinglei Xu 徐静蕾
Ashley Xu 徐和安
XU Exercise 嘘字诀
Alex Xu 阿列克斯·徐 ; 徐祚立
jack xu 许良杰 ; 徐哲磊 ; 许朝军
以上来源于: WordNet
N a monetary unit of Vietnam worth one hundredth of a dông 苏; 越南货币单位，100分等于1盾。
为什么徐伟为中国感到骄傲？
Xu has learned English all by himself.
徐是自学英语的。
Xu is now better known as Jason, his English name.
徐现在更广为人知的名字是他的英文名杰森。
Xu Da-ju from China wrote that his country has thousands of proverbs.
VOA: special.2009.03.01
A Pentagon release says Gates and Xu also agreed to other high level visits, and to exchanges among lower-ranking service members.
VOA: standard.2009.10.27
General Xu said the U.S.-China military relationship might have to endure what he called some more "shocks of adversity."
VOA: standard.2009.10.27
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