Tephra
[复]n.[用作单或复][地]火山灰
🗣️ 情景例句
Easy does it, Robbie.
慢慢来， Robbie。
We are short of hands now.
我们现在人手不足。
because balloons can be a great danger to aircraft.
因为气球有可能给飞机造成极大的危险。