Bressein
[化] 短菌肽
🗣️ 情景例句
I have tea with y colleagues in the afternoon.
下午我和同事喝茶。
Please come in and have a orange.
请进来吃一个桔子。
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。