Topophylaxis
局部防卫法; 局部防卫法
🗣️ 情景例句
The girl always wears a happy smile.
这女孩随时都面带快乐的微笑。
Do one's level best.
尽力而为。
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。