ball bearing
noun [ C ] uk/ˌbɔːl ˈbeə.rɪŋ/ us/ˌbɑːl ˈber.ɪŋ/
滚珠;滚珠轴承
a small metal ball or several of these arranged in a ring to make particular parts of a machine move more easily
江苏热线英汉汉英双解词典包含207361条英汉翻译词条,涵盖了常用英语单词及词组短语的翻译及用法,是英语学习的必备工具。