Abrasimeter
耐磨试验仪
🗣️ 情景例句
There's a time for everything.
事情要一件一件地做。
I think he will buy something.
我想他会买什么。
After it had passed, they swam on as quickly as they could because they knew that the boat would soon return.
快艇过去之后，他们以最快的速度向前游去，因为他们知道快艇马上就要转回来。