“起劲地”造句

鲍勃起劲地吃着。
Bob ate lustily.

起劲地工作,几个小时就干完了.
He ploughed into his work and finished it in a few hours.

我们正在愉快地交谈, 她却起劲地加了进来,说些没人爱听的话.
We were enjoying a pleasant conversation , until she sailed in with her unpleasant remarks.