Ballscrew
滚珠丝杠
🗣️ 情景例句
instead of redesigning the entire system.
而不必重新设计整套系统。
No, I'm listening to the radio.
没有，我在听收音机。
Then I arrived home at six o'clock yesterday evening. He telephoned again.But I didn't answer the phone!
后来，我昨晚6点钟回到家里。他又打来电话，但我没接。