| 词汇 | ball bearing |
| 释义 | ball bearing 1 ENTRIES FOUND: ball bearing (noun) ball bearing noun plural ball bearings ball bearing noun plural ball bearings Learner's definition of BALL BEARING [count] 1 : a part of a machine in which another part (such as a metal pole) turns easily ◊ A ball bearing is made up of several small metal balls that fit between two metal rings.滚珠轴承，球轴承（由装在两个钢圈之间的多个小钢球组成） 2 : one of the balls in a ball bearing（滚珠轴承中的一个）钢球，滚珠 |
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