1.
Space is, for the most part, emptiness.
太空绝大部分是空洞的。
2.
It turned out to be a shallow document.
它结果竟是一份空空洞洞的文件。
3.
A cave or hollow used as a refuge or hiding place.
洞穴一个用于避难或藏身的洞穴或空洞
4.
Speech or writing deemed banal or foolish.
空洞无聊的话或文章
5.
complacently or inanely foolish.
自满的、空洞的或愚蠢的。
6.
elephant dugout
【军】大壕沟, 大防空洞
7.
His speech rang hollow.
他的发言听上去很空洞。
8.
An empty promise is insincere.
空洞的诺言是无诚意的。
9.
as if echoing in a hollow space.
好像空洞里的回声一样。
10.
an article completely empty of matter
内容十分空洞的文章
11.
His preachings rang hollow.
他的说教听起来很空洞。
12.
Empty or pretentious bragging.
吹牛空洞或造作的大话
13.
They are windy phrases.
它们是空洞的短语。
14.
The condition or quality of being inane.
空虚，空洞空的情况或状态
15.
Why must they write such long and empty articles?
为什么一定要写得那么长，又那么空空洞洞的呢？
16.
It was now empty, forlorn, and apparently abandoned.
现在是空空洞洞，冷冷清清，分明已经无人居
17.
Empty words or ideas.
废话，空谈空洞的词语或思想
18.
Unit 101 The Ozone Hole：Why over Antarctica?
臭氧空洞：为什么出现在南极洲上空?