Sǐjìyìngbèi xué yǔyán shì shì bèi gōng bàn de zuòfǎ.
Learning a language by rote memorization is a case of twice the effort, half the result.
Tips
history
From 《孟子·公孙丑上》, where Mencius contrasts his era with the sages of old: 'half their effort would bring twice the result.' 事倍功半 is the inverse — twice the effort, half the result.
mistakes
Do not confuse with 事半功倍 (shì bàn gōng bèi, 'half the effort, twice the result') — the two idioms are exact opposites and swapping 倍/半 flips the meaning.
