1. He observes keenly but says little. 他注意观察但很少讲话。
2. The poem is only a fragment, but the poet's genius can be keenly felt. 这首诗只是一个片段,可是诗人的天才是可以清楚地感觉到的。
3. Our directresses encourage and guide, and are keenly aware of your child's development, and introduce new challenges when appropriate. 我们的教师鼓励、指导,并且能够敏锐地了解您孩子的发展,在适当的时候会引入新的挑战。