A roller bearing
滚柱轴承
🧩 词语组成解析
🗣️ 情景例句
Well, please sit down
嗯， 请坐下来
She began playing the violin when she was nine.
她从九岁就开始练习小提琴。
The airport was built years ago, but for some reason it could not be used then.
机场是许多年前建的，但由于某种原因当时未能启用。