名词
中文翻译：管状的
同义词：
['tube', 'cylindrical']
例句：
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1. The tube was filled with water and sealed at both ends.
这个管子里灌满了水，两端都密封了。
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2. The cylindrical shape of the cylinder is important for its function.
圆柱体的形状对于它的功能很重要。
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3. The tube conducts heat very well, making it a popular choice for heating systems.
这种管子导热性能很好，因此是供暖系统的首选。