adj.空的；空洞的；凹陷的；虚伪的；(声音)沉闷的
n.山谷；洞；窟窿
vt.挖空
vi.形成空洞
adv.完全地；彻底
This tree looks high and strong but actually its trunk is hollow. 这棵树看起来又高又壮，实际上树干是空的。
His protests on human rights sound hollow. 他就人权问题提出的抗议听来很空洞。
He was thin and his cheeks were hollow. 他很瘦,连面颊都凹陷了下去。
An open enemy is better than a hollow friend. 宁有公开的敌人，不要虚伪的朋友。
She could hear nothing but the hollow echo of his steps. 除了他的脚步的低沉回音，她什么声音都听不到。
用作名词 (n.)The track dipped, weaving into a wooded hollow. 小路消失了，迂回前行到了一片多树的山谷里。
Squirrels often use a hollow in a tree to store nuts. 松鼠常用树洞储藏坚果。
I crawled under the house and crept into a dark hollow of a brick chimney. 我爬到屋子底下，钻进了砖烟囱的黑窟窿里。
用作及物动词 (vt.)The Indians used to hollow out a log to make a canoe. 印第安人过去常挖空圆木制成独木舟。
用作副词 (adv.)I played Max at chess yesterday and beat him hollow. 昨天我跟麦克斯下棋，杀得他一败涂地。
