Biphone
电话耳机, 飞行帽耳机
🗣️ 情景例句
Don't put all your eggs in on basket.
不要孤注一掷。
Nobody's at home.
家里面没人。
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。