无底洞的英文：
abysm
abyss
the bottomless pit

参考例句：

At night they stayed in a temple. The evil spirit took Tang Priest to her Bottomless Cave using an evil wind.
夜晚，他们宿于一寺庙，耗子精用妖风把唐僧擒到住处无底洞。

Fighting in the Bottomless Cave
大闹无底洞

A beggar's purse is bottomless
乞丐的钱袋是无底洞

An unfathomable chasm;a yawning gulf.
深渊，无底洞深不可测的裂缝;张开的深壑

The war swallowed up many young men into its maw.
战争把许多青年男子吞进了它的无底洞。

I saw the opening maw of hell(Herman Melville)
我看到地狱张开了无底洞(赫尔曼·梅尔维尔)

abysm是什么意思：
n. 深渊;无底洞;地狱;混沌

He took courses to remedy his abysmal ignorance.
他学课程以弥补他极大的无知。

Although there is an abysmal lack of educational software, the number of computers in schools expands rapidly.
虽然教学上用的软件十分紧缺，学校的计算机数量却迅速增加。

abyss是什么意思：
n. 深渊，无底洞；险恶的境地；极大的差异，鸿沟；地狱；深邃

Send these foul beasts into the abyss!
送这些肮脏的畜生下地狱吧！

Does it not lead to an abyss?
它没有通往地狱吗？

God and man are divided by a fundamental abyss.
上帝与人类之间隔有一条根本性的鸿沟。

bottomless是什么意思：
a. 无底的;深不可测

A beggar's purse is bottomless
乞丐的钱袋是无底洞

Geffen has a hunger for success that seems bottomless.
格芬的成功欲望似乎永无止境。

But above all they contain a bottomless reserve of cheap labour.
但是主要是这些地方有无穷无尽的廉价劳动力储备。