名词
中文翻译：不稳固的
同义词：
['unstable', 'unsteady', 'shaky', 'unreliable']
例句：
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1. The penitabular structure of the building is prone to collapse during earthquakes.
这座建筑的不稳固结构在地震中容易倒塌。
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2. The new road was built with penitabular materials, making it difficult to repair.
这条新路是用不稳固的材料建造的，很难修复。
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3. The project's financial stability is threatened by the penitabular economic growth.
该项目的经济稳定性受到不稳定经济增长的威胁。