adj.快乐的；振奋的
动词buck的过去式和过去分词形式.
The plane bucked a strong head wind. 飞机顶着强烈的逆风飞行。
Buck up! We're going to be late. 快点儿! 我们快要晚了。
The good news bucked us all up. 大家听了这个好消息都高兴起来。
She felt really bucked after passing her driving test. 她驾驶测验合格後，感到很高兴。
