r. in a keen and discriminating manner
adv. 锐利地, 敏捷地, 激烈地
1. She is keenly interested in learning new languages.
她对学习新语言非常感兴趣。
2. He listened keenly to the instructions given by the teacher.
他专心地听老师给出的指示。
3. The children watched the movie keenly, unable to take their eyes off the screen.
孩子们专注地看着电影，无法移开目光。