“离中心”造句

请保持地方清洁, 并于使用后把所有废物带离中心.
Please keep the place clean, and throw away any garbage.

椭圆越扁平,两焦点之间的距离越远,每个焦点离中心的距离也越远.
The flatter the ellipse the farther apart the foci and the farther each focus the center.

• #离中心