Oper
abbr. 古波斯语（等于O. Per.）
🗣️ 情景例句
His concert brought the house down.
他的音乐会博得满堂彩。
Travel east or travel west, a man's own home is still the best.
走到东，走到西，最好还是到家里。
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。