女孩子们拿着桶和铲子在沙滩上快活地玩耍。The girls happily played in the sand with buckets and spades.他们快活地扑向三明治。They fell on the sandwiches with alacrity.鸟儿在快活地歌唱.Birds were a singing merrily....

“快活地”的英语可以翻译为：livelily，genially，airily，chirpily，bonnily ...