n.敏捷；活泼；乐意
She sprang to the door with alacrity. 她敏捷地跳到门口。
Although the man was very old, he still moved with alacrity. 他虽然很老,动作仍很敏捷。
He carved, and ate, and praised with delighted alacrity. 他边切边吃，又兴致勃勃地赞不绝口。
