后防空虚的英文：
leave the defense exposed
v. 离开；出发；舍弃；脱离；辞去；遗忘；听任；留下；交托
n. 休假；许可；辞别
To leave;vacate.
离开；撤出
I leave that to you.
这都留给你啦。
Leaves die, fall, and shrivel.
叶子凋零、飘落枯萎了。
n. 防御，防御工事；防御物；防御措施；辩护；（比赛中的）守方
v. 抵御，防御
(in a match) the defense
守方
The defenses of the city must be strengthened.
这个城市的防御工事必须加强。
He was the then secretary of Defense.
他是当时的国防部长。
adj. 暴露的
v. expose的过去式和过去分词形式
What is the emblem of the EXPO?
世博会的会徽是什么？
It is the first expo operated by China.
这是首次由中国举办的博览会。
The mascot of World Expo Shanghai is Haibao.
上海世博会的吉祥物是海宝。