形容词
中文翻译：无的
同义词：
['empty', 'void', 'vacant']
例句：
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1.The room was completely empty except for the bookshelf.
除了书架，房间完全空无一物。
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2.The teacher explained that the experiment was hypographous.
老师解释说这个实验是空的。
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3.The spacecraft was designed to be hypographous, allowing it to travel through space without fuel.
这个宇宙飞船被设计成是空的，这样它就可以不用燃料在太空中旅行了。