释义
n. 洞,窟窿,山谷 a. 空的,虚伪的,空腹的 v. 形成空洞,挖空
例句
1. This tree looks high and strong but actually its trunk is hollow. 这棵树看起来又高又壮，实际上树干是空的。 2. His protests on human rights sound hollow. 他就人权问题提出的抗议听来很空洞。