Isonopinone
二甲基双环庚酮
🗣️ 情景例句
Always full of surprises.
总是出人意表。
Please ring off.
请挂电话。
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。