The doctor said the medicine was slow-acting and suggested that I take it persistently.
医生说这种药比较迟效，让我坚持服用。

Having being upsetted, he became a bit slow-witted.
他受了刺激，变得有些呆痴。

Mrs. Tweedy, the vicious camp commandant, and her slow-witted, henpecked husband have shown her prisoners what happens to a hen who hasn't laid eggs: it becomes a chicken with its head cut off.
这个苦役拘禁地邪恶的总长顿笛太太以及她那愚笨、惧内的丈夫向她的囚犯们展示了母鸡不下蛋会有什么结果：剁下脑袋，变成鸡肉。

Slow slow tune by Li Qingzhao is a very famous long and slow-rhymed ci.
李清照的《声声慢》是非常著名的一首慢词。

Mother's words touched my slow-witted mind.
母亲的一番话打动了我一贯愚痴的心。