Traditional: 落後
落后 (luò hòu) means “to fall behind; to lag (in technology etc); backward; to retrogress”. It is an HSK 5 Chinese word (traditional 落後) in the HSK 3.0 vocabulary.
如果不努力学习,就会落后于其他同学。
Rúguǒ bù nǔlì xuéxí, jiù huì luòhòu yú qítā tóngxué.
If you don't study hard, you'll fall behind other classmates.
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