1·We must imagine the early Earth as a mixture of rocky materials, metals, and trapped gases, subject to constant bombardment by smaller planetesimals and without much of an atmosphere.
我们必须想象早期的地球是岩石材料、金属和封闭气的混合物，受到较小的星子的持续轰击，没有多少大气。
2·The idea that trace amounts of water in planetesimals could give rise to vast oceans may seem far-fetched until one considers how small an ocean can be relative to the size and mass of a planet.
星子中微量的水造就了宽阔的海洋这一观点也许看起来不切实际，直到人们认识到相对于一颗行星的质量和体积，浩瀚的海洋是多么的渺小。
3·The idea that trace amounts of water in planetesimals could give rise to vast oceans may seem far-fetched until one considers how small an ocean can be relative to the size and mass of a planet.
星子中微量的水造就了宽阔的海洋这一观点也许看起来不切实际直到人们认识到相对于一颗行星的质量和体积，浩瀚的海洋是多么的渺小。
4·We consider that comets would evolve from the surviving planetesimals in Jupiter-Neptune region. Such planetesimals make of both the rocky and icy materials and may be called ase...
作者认为，彗星是木星到海王星这个区域中的残存星子演变而成的。
5·Carbonaceous chondrite planetesimals were adsorbed on the mantle surface of the primitive earth, forming primitive carbon-rich areas.
碳质球粒陨石星子被吸积于原始地球上地幔表层，形成原始富碳区。