理论

例句

• lǐ理lùn论xué学xí习 。

  Theory study.

• xué学dào到de的lǐ理lùn论xū需yào要zài在shí实jiàn践zhōng中bú不duàn断jiǎn检yàn验 。

  The theory learned needs to be constantly tested in practice.

用法