Stepmotor
n. 步进电动机
🗣️ 情景例句
I was really worried.
刚才我真的很担心。
What is the economy like in this country?
这个国家的经济如何？
The building of skyscrapers in New York began around the year 1900.
在1900年左右，摩天楼开始在纽约兴建。