Clearheadedness
n. clearheaded的变形
✅ 同义词
🗣️ 情景例句
Please sit down.
请坐下。
That eases my mind.
那我就放心了。
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。