Microspindle
千分尺轴; 千分螺桿
🗣️ 情景例句
I'm just not sure about what I want to do.
我不知道该读什么？
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
Indeed they can have a delightful surprise when they find something useful which they did not know they owned.
确实，一旦无意之中从自己的收藏品中找到某件有用的东西时，可以给人一种惊喜的感觉。