PHRASE
刺激(某人)對…的欲望;激發(fā)（某人）對…的興趣
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錄也可以激起顧客購買的欲望。
...lectures he hopes might whet the appetite and keep students' enthusiasm.
他希望能激發(fā)學(xué)生們的興趣，保持他們的熱情的講座