Smokescope
烟雾浓度; 烟雾浓度测量器
🗣️ 情景例句
Keep it down!
小点儿声！
I'll pick up ticket at the airport counter.
我会在机场柜台拿机票。
Although we can't see these atoms, they really do exist.
虽然我们看不见原子，但它们的确存在。