If it were a grazing collision by a big object, that could have pushed hard enough on the planet to tip it over.

如果这是来自一个大物体的擦碰，那么它可能会对这颗星球产生足够大的推力，使其翻倒。

A Mars-sized planet, given the unofficial name Theia, slammed into our young planet, but it wasn't a head-on impact; it was a grazing collision.

一个火星大小的行星，它有个非正式的名字 Theia，撞上了我们年轻的星球，但不是正面撞击，而是沿切线的掠射。