Correct

不分上下

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不分上下-Chinese-idioms-Cchatty-b510cc02-1c00-4364-87b6-948d6f0b8e7b-1612776194.jpg

Collocation

1
还是不分上下
2
……不分上下
3
能力不分上下
4
水平不分上下

Definition

不分上下:

Literally means:

be at the same level

Actually means:

It means that it is hard to say which one is better. It means two people or teams are at the same level.

分不清哪个水平高,哪个水平低。指力量或者水平相当。

Example

Used as predicate. (作谓语)
1
Zhè
liǎng
yuán
雇员
de
zhìhuì
智慧
gànjìn
干劲
fēnshàngxià
不分上下
  
,
lǎobǎn
老板
hěn
wéinán
为难
  
,
zhīdào
知道
yīnggāi
应该
ràng
ge
哪个
rén
shēngzhí
升职
  

The wisdom and drive of the two employees are equal, and the boss is embarrassed and doesn't know who should be promoted.

2
Zhè
liǎng
zhī
qiúduì
球队
shuǐpíng
水平
fēnshàngxià
不分上下
  
,
xiànzài
现在
hěnnánshuō
很难说
ge
哪个
duì
huì
yíng
  

The two teams are level and it's hard to say which team will win.

3
Zhè
liǎng
qiúduì
球队
zài
guò
过去
nián
de
jiàoliàng
较量
zhōng
fēnshàngxià
不分上下
  
,
shuōmíng
说明
shuāngfāng
双方
de
shuǐpíng
水平
xiāngdāng
相当
  

The fact that the two teams have played each other in the last few years shows that the level of both sides is equal.