汤姆在学习上落后于人。

Tom was backward in his studies.

youdao

最糟糕的是，第一次作弊没被发现的人往往还会进行第二次，不仅因为他/她在学习上更加落后了，也因为作弊看上去更容易。

Worst of all, a cheater who doesn't get caught the first time usually cheats again, not only because he/she is farther behind, but also because it seems "easier."

youdao