1. 空的　empty;vacant
2. 凹的　lacking flesh so that the skin sinks inwards
3. 空洞的　having a ringing sound like the note when an empty container is struck
4. 虚伪的　deceptive;deceitful

　～ pipe　空心管子
　～ words　空洞的言语
　～ laugh　虚伪的笑
　～ promises　虚伪的允诺

　Bamboo is a sort of hollow plant.　竹子是一种中空的植物。
　He has hollow cheeks.　他的双颊凹陷。
　A bar of iron is solid;a pipe is hollow.　铁棍是实心的，而管子是空心的。
　A drum is hollow.　鼓是空心的。
　The words you say are very hollow.　你讲的话很空洞。
　He declared that he was telling the truth, but his words rang hollow.　他自称说的都是真话，但听起来不像真的。

C 洞，坑，凹地a space sunk into sth, especially into the ground

　The hollow was full of trees but the higher ground was covered with grass.　凹地树木成林，但高处长满青草。

 ♣ hollow, den, hole
　参见hole条。