名词短语
中文翻译：摇摆的枢纽
同义词：
['unstable hub', 'unsteady hub例句：1. The old clock tower was teetering on the edge of collapse.（那座旧时钟塔摇摇欲坠，随时可能倒塌。）']
例句：
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1. The old clock tower was teetering on the edge of collapse.
那座旧时钟塔摇摇欲坠，随时可能倒塌。
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2. The train's engine was teetering on the brink of failure.
火车引擎岌岌可危，随时可能失败。
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3.The bridge was teetering between life and death.
这座桥在生死边缘摇摆不定。