Correct

新鲜劲儿

/ xīn xiān jìn r /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/新鲜劲儿-Chinese-idioms-Cchatty-19d67f65-b91e-4847-8664-fcb28c3d9143-1612777415.jpg

Collocation

1
一时的新鲜劲儿
2
没有了当初的新鲜劲儿
3
对……(某事或某人)失去了新鲜劲儿
4
新鲜劲儿过了

Definition

新鲜劲儿

Literally means:

fresh enthusiasm

Actually means:

It refers to the temporary enthusiasm in one's first encounter of something. Such enthusiasm will soon wear off.

指初次接触某事物而一时产生的,往往不久就消失的兴趣。

Example

Used as subject or object. (作主语、宾语)
1
guǎn
不管
gànshénme
干什么
shì
  
,
zhīyǒu
只有
sān
fēnzhōng
分钟
热度
  
,
xīnxiān
新鲜
jìnr  
劲儿
guò
  
,
jiù
xiǎng
gàn
le
  

No matter what he does, he only has three minutes of heat, fresh energy, do not want to do.

2
Xiǎo
de
shíhou
时候
jīngcháng
经常
nào
zhāo
yào
qīnqi
亲戚
jiā
wán
  
,
dàn
cóng
dòu
zhōngxué
中学
kāishǐ
开始
  
,
jiù
mànmàn
慢慢
shī
失去
le
xīnxiān
新鲜
jìnr  
劲儿
  

When he was young, he often went to relatives' house to play, but from the beginning of high school, he slowly lost his fresh energy.

3
guǒ
如果
xiǎng
zuòchéng
做成
jiàn
shì
  
,
jiù
dìng
一定
yào
yǒu
nàixīn
耐心
héngxīn
恒心
  
,
guāng
kào
shí
de
xīnxiān
新鲜
jìnr  
劲儿
  
,
shì
zuò
chéng
de
  

If you want to do something, you must have patience and perseverance, just a moment of fresh energy, can not do.