The difficulty is the viewing geometry that puts any Trojan, from the perspective of an Earth-based telescope, in bright skies.
观测特洛伊小行星的难点在于，在通过地面望远镜观测时，几何角度总是使其位于明亮的天空中。
2
The Renaissance masters turned geometry from a craft into the liberal art of perspective.
文艺复兴时期的大师们将几何从一门手艺变成了透视画法的一门艺术。
3
Born in 20th century 70's of fractal geometry for people to observe and provides a new perspective, natural and designers with rich layers of things and phenomena of attention and interest.