勤能补拙 Diligence is the means by which one makes up for one's dullness. 或 Hard work can often make up for a lack of intelligence. 或 Diligence redeems stupidity.
以下几种翻译供参考 Diligence makes up for want of ability.推荐此翻译 Hard work can make up for a lack of intelligence. Diligence redeems stupidity. It is diligence that makes up for deficiency. Diligence is the means by which one makes up for one's dullness.