dunce

1. N-COUNT If you say that someone is a dunce, you think they are stupid because they find it difficult or impossible to learn what someone is trying to teach them. 笨學生[表不滿]

Michael may have been a dunce at mathematics, but he was gifted at languages. 邁尅爾在數學方麪可能是個笨學生，但他在語言方麪是有天賦的。