向某人反复灌输;对某人反复讲述
drum sth into sb
to make sb remember sth by repeating it a lot of times
We had it drummed into us that we should never talk to strangers.我们曾被反复叮嘱千万不要与陌生人讲话。
释义来自《牛津高阶英汉双解词典》第 9 版