直到中号尺寸，圆柱滚子轴承一般都配置一个玻璃纤维增强尼龙保持架或一个钢板冲压保持架。

Up to medium size, cylindrical roller bearings are generally fitted with a cage of glass-fibre reinforced polyamide or a pressed sheet-steel cage.

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有三种尺寸—小号、中号和大号。

There are three sizes—small, medium and large.

《牛津词典》

青少年的衣服尺寸改变了。现在小号的衣服过去是中号。

Teens' clothing sizes changed. A small used to be a medium.

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