名词
中文翻译：中心关系
同义词：
['central relation', 'obstruction例句：1. The central relation between the two countries is crucial for their peaceful coexistence.（两国之间的中心关系对于他们和平共处至关重要。）2. The occlusion of the tunnel by the mountain blocked all travel through it.（山体挡住了隧道，阻断了所有通过它的旅行。）']
例句：
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1. The central relation between the two countries is crucial for their peaceful coexistence.
两国之间的中心关系对于他们和平共处至关重要。
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2. The occlusion of the tunnel by the mountain blocked all travel through it.
山体挡住了隧道，阻断了所有通过它的旅行。
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3.The occlusion of the airway can lead to serious health problems.
空气道的堵塞可能导致严重的健康问题。