Fallup
n. 放射性尘埃对海洋地区的污染
🗣️ 情景例句
She'll be back around 2:30.
大概两点半会回来。
He's a teather.
他是教师。
As a reasonable guess, they might, on an average, be 100 light years away.
据合理推算，外星人离我们平均距离也有100光年之远