Cathodogram
电子衍射示波图, 阴极射线示波图
🗣️ 情景例句
OK.
好。
I worked at the hardware store this afternoon.
我今天下午在五金行工作。
He has been able to tell us more about active volcanoes than any man alive.
他能告诉我们的有关活火山的情况比任何在世的人都要多。