Correct

心知肚明

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/心知肚明-Chinese-idioms-Cchatty-ab333aa3-3570-4524-a2f8-6016dc93d492-1612777066.jpg

Collocation

1
做到心知肚明
2
心知肚明的事情
3
应该是心知肚明
4
大家心知肚明

Definition

心知肚明

Literally means:

have tacit under standing

Actually means:

It often indicates that one knows the situation, but does not want to tell the details.

表示对某事心里非常明白。常含有尽管明白,但不想说出详细情况的意味。

Example

Used as predicate, object or attributive. (作谓语、宾语、定语)
1
shí
其实
  
,
yǒuxiē
有些
dōng
东西
jiā
大家
xīnzhīmíng
心知肚明
  
,
méiyǒu
没有
yào
必要
chūlái
出来
duō
shuō
  

In fact, there are some things that we all know, there is no need to take out more to say.

2
Fángchǎnshāng
房地产商
huò
获取
bào
暴利
  
,
zhè
shì
xīnzhīmíng
心知肚明
de
shì
  
,
hái
yào
需要
men
我们
duōfèikǒushé
多费口舌
ma
  
?

Real estate developers to obtain windfall profits, this is a well-known thing, but also need us to pay more words?

3
Yǒuxiē
有些
chǎngshāng
厂商
zài
guǎnggào
广告
kuā
夸大
chǎnpǐn
产品
de
xiàoguǒ
效果
  
,
jiūjìng
究竟
wèile
为了
shénme
什么
目的
  
?
jiā
大家
yīnggāi
应该
dōu
shì
xīnzhīmíng
心知肚明
de
  

What is the purpose of some manufacturers to exaggerate the performance of their products in advertisements? Everyone should know.