Derivometer
测偏仪
🗣️ 情景例句
Your grandfather went to the Engineering School there.
你爷爷进那个工学院。
As you travel westward,does the land get higher?
当你向西旅行，陆地变得更高？
Then we'd have some ideas of what you'll be needing
那么我们就会心中有点儿数，知道你们需要什么了。