PHRASE
刺激(某人)对…的欲望;激发（某人）对…的兴趣
If someone or something whets your appetite for a particular thing, they increase your desire to have it or know about it, especially by giving you an idea of what it is like.
例句
A really good catalogue can also whet customers' appetites for merchandise.
一份真正好的商品目录也可以激起顾客购买的欲望。
...lectures he hopes might whet the appetite and keep students' enthusiasm.
他希望能激发学生们的兴趣，保持他们的热情的讲座