名词中文翻译
中文翻译：开口
同义词：
['outlet', 'opening例句：1. The ostium of the tunnel is blocked by a large rock.（隧道的开口被一块大石头堵住了。）']
例句：
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1. The ostium of the tunnel is blocked by a large rock.
隧道的开口被一块大石头堵住了。
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2.The ostium of the river is lined with trees.
河的开口处有一排树。
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3. The ostium of the cave was dark and damp.
洞穴的开口处黑暗潮湿。