Backmixing
[化] 返混
🗣️ 情景例句
Where are you going, Philip?
你上哪去 Philip？
To jump into the pool
跃入游泳池中
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我们所知道的现有恒星数目估计约有30亿×1000亿颗。