adv.敏锐地, 强烈地, 热心地
I felt her death keenly.
He keenly felt that he should do something to help.
He observes keenly but says very little.
He observes keenly, but says little.
敏锐地, 锐利地; 强烈地; 热心地
He felt his loneliness most keenly on Sunday.
He was keenly resolved to do well in the examination.