Machmeter
n. 马赫计
🗣️ 情景例句
When does the next train leave for New York?
到纽约的下一趟火车什么时候开车？
Car manufacturers are having a bad time.
汽车制造商的日子不好过。
One authority on spiders made a census of the spiders in grass field in the south of England,
一位研究蜘蛛的权威对英国南部一块草坪上的蜘蛛作了一次调查。