名词
中文翻译：Unknown
同义词：
['expansive shell', 'expanding structure']
例句：
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1. The expanding shell of the coral reef is a marvel of nature.
珊瑚礁的膨胀外壳是大自然的奇迹。
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2. The expanding shell of the coral reef is a marvel of nature.
珊瑚礁的膨胀外壳是大自然的奇迹。
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3. The expanding shell of the coral reef is a marvel of nature.
珊瑚礁的膨胀外壳是大自然的奇迹。