krypton
n[U]
chemical element, an inert colourless and odourless gas 氪. =>App 10 见附录10.
🗣️ 情景例句
2,3,4 ... now switch. ... 2 3 4
……现在 左右交替……
My class went camping last summer.
去年夏天我们班去露营了。
I want to ask you for your advice. When I leave school, I want to be an engineer. For years I have been interested in engineering. I have made tools at home and have written articles for magazines. My father says that engineering is not a suitable subject