Correct

主力军

/ zhǔ lì jūn /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/主力军-Chinese-idioms-Cchatty-8ec6bfb6-5954-4433-af5c-90eba279234c-1612776305.jpg

Collocation

1
是……(某主力军方面)的主力军
2
作为主力军
3
成为主力军
4
是主力军

Definition

主力军:

Literally means:

the major military forces

Actually means:

主力, the main force.

This phrase literally refers to the major military force in a battle. It figuratively means the force that plays the dominant role. Commendatory.

主力,主要力量。

主力军,作战中充当主力的部队。也比喻起主要作用的力量。具有褒义色彩。

Example

Used as subject or object. (作主语、宾语)
1
Zài
shìjiè
世界
guó
各国
  
,
tuīdòng
推动
jīng
经济
zhǎn
发展
de
zhǔjūn
主力军
shì
zhōng
xiǎoxíng
小型
企业
  

In countries around the world, the main force driving economic development is small and medium-sized enterprises.

2
Zài
lǎo
dài
一代
péiyǎng
培养
xià
  
,
yǒu
qīngnián
青年
科技
réncái
人才
chéngwéi
成为
guó
我国
zǎirén
载人
hángtiān
航天
gōngchéng
工程
de
zhǔjūn
主力军
  

Under the training of the older generation, a group of young scientific and technological talents have become the main force of China's manned space engineering.

3
Zhèxiē
这些
shí
zǒuhóng
走红
de
chàng
歌唱
jiā
  
,
méiyǒu
没有
shòu
guò
yán
严格
xùnliàn
训练
  
,
hěn
nán
zài
tán
歌坛
shàng
chéngwéi
成为
míngshí
名副其实
de
zhǔjūn
主力军
  

These popular singers, without strict training, it is difficult to become a veritable force in the music industry.