名词
中文翻译：门
同义词：
['gate', 'entrance', 'passage']
例句：
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1.The portal of the castle is guarded by a tower.
城堡的入口由一座塔守卫。
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2.The portal to the library was closed due to maintenance.
图书馆的入口因维修而关闭。
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3.The portals of the palace were adorned with intricate carvings.
宫殿的大门上装饰有精美的雕刻。