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新东方-柯林斯雅思备考词典
diameter
英 [daɪˈæmɪtə]
[NOUN]
diameters
1. [C 可数名词] 直径
The diameter of a round object is the length of a straight line that can be drawn across it, passing through the middle of it.
双语例句
例：a tube less than a fifth of the diameter of a human hair.
一根直径不到头发五分之一的微管。
例：a length of 22-mm diameter steel pipe.
一根直径22毫米的钢管。