Correct

无底洞

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/无底洞-Chinese-idioms-Cchatty-7a414099-3180-4165-b6aa-f325fd2bb93e-1612777423.jpg

Collocation

1
陷入无底洞的局面
2
填不满的无底洞
3
真是个无底洞
4
是个无底洞
5
变成无底洞

Definition

无底洞:

Literally means:

bottomless pit or hole

Actually means:

It figuratively means that one's desire is insatiable or that he makes one demand after another.

It also figuratively means an endless thing.

深不见底的洞。比喻满足不了的欲望或没有休止的需求。

也比喻永无止境的事情。

Example

Used as object or attributive. (作宾语、定语)
1
tài
tāncái
贪财
le
  
,
érqiě
而且
wèikǒu
胃口
yuèláiyuè
越来越
  
,
jiù
xiàng
tián
mǎn
不满
de
dòng
无底洞
  

He's too greedy for money, and his appetite is growing, like filling a bottomless hole in discontent.

2
Zhèzhǒng
这种
xiāntiān
先天
xìng
de
bìng
疾病
无法
chè
彻底
zhì
hǎo
  
,
ér
dòng
无底洞
shìde
似的
yàofèi
药费
shì
bān
一般
gōngxīnjiēcéng
工薪阶层
de
jiātíng
家庭
nán
难以
chéngshòu
承受
de
  

This congenital disease can not be completely cured, and bottomless drug costs are the average working-class families can not afford.

3
Yóu
由于
néng
cóng
yuántóu
源头
shàng
yǒuxiào
有效
fáng
预防
huánjìng
环境
rǎn
污染
  
,
yīn
因此
yǒuxiē
有些
huánjìng
环境
zhì
治理
gōngzuò
工作
几乎
xiàn
dòng
无底洞
de
jìng
境地
  

Because it is not able to prevent environmental pollution effectively from the source, some environmental management work is almost bottomless.