形容词
中文翻译：不稳固的
同义词：
['fragile', 'flimsy', 'unstable']
例句：
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1. The old wooden chair was rackety and couldn't support her weight.
那把旧木椅很不稳定，她坐上去都承受不住。
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2. The fragile glass plate shattered when the table was knocked over.
当桌子被撞倒时，那片易碎的玻璃板就碎了。
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3. The new car is so rackety that it needs to be repaired frequently.
这辆新车太不稳固了，需要经常修理。