n.布谷鸟；杜鹃
A cuckoo began calling from a hawthorn tree. 一只布谷鸟开始在一株山楂树里咕咕地呼叫。
The cuckoo lays its eggs in other birds' nests. 杜鹃在别的鸟巢中产卵。
The cuckoo is a herald of spring. 杜鹃是春天的先驱。
