Photion
充气光电二极管
🗣️ 情景例句
Hi, this is Mike Johnson.
嗨， 我是Mike Johnson。
He that is full of himself is very empty.
自满的人是很空虚的。
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。