Thus, if the majority of the small amounts of water in a planetesimal reaches a planetary surface as its magma solidifies, this would be enough to form oceans that are similar to Earth's.
因此 一个行星表面大部分的微量水元素到达岩浆的表面就凝固了，这将足够形成像地球上这样的海洋。
2
When the planetary migration occurs under the tidally interaction of a planet and a disk of gas or a planetesimal, the orbital parameters, especially, semi-major axis, of this planet will be altered.