Flechette
航空箭形弹; 剪弹
🗣️ 情景例句
How many people are there in your family?
你家里有几口人？
When the weather is hot, we turn on the air conditioner.
天热的时候就开空调。
rising at one-foot intervals all the way to the top of the atmosphere.
并按1英尺的间隔从地面一直排列到大气层的顶端。