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[医] 同种移植物
🗣️ 情景例句
My brother Robbie ...
我弟弟Robbie……
No. It's not far at all.
不用。很近的。
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。