形容词
中文翻译：空洞的
同义词：
['empty', 'void', 'hollow例句：1. The room was filled with the sound of laughter and chatter.（房间里充满了笑声和闲聊声。）']
例句：
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1. The room was filled with the sound of laughter and chatter.
房间里充满了笑声和闲聊声。
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2. The book is vacuous;it contains no real content or information.
这本书是空洞的；它没有真实的内容或信息。
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3.The teacher's lecture was vacuous; there was no substance to it.
老师的讲座空洞无物；没有实质性的内容。