| 1. | The protoplanets were huge affairs .
原行星是一个巨大的天体。 |
| 2. | In the meantime the protoplanet cores were proceeding to consolidate .
在此期间，原行星的核开始凝成。 |
| 3. | The peaceful evolution of the protoplanets reached a more dramatic phase .
平静的原行星进化到富有戏剧性的状态。 |
| 4. | While the protoplanets were coming into existence the sun was still dark .
当原行星刚刚形成时，太阳还是暗淡无光的。 |
| 5. | These were the protoplanets from which the planets of the present developed .
这些就是原行星，现在的行星正是从它们演化而来的。 |
| 6. | Proto - planetary system
原行星系 |
| 7. | Proto - planetary disk
原行星盘 |
| 8. | Another version has it that large and small protoplanetary discs of the same mass may form exoplanets differently
另一种说法认为大小不一但质量相同的原行星盘就可能形成各自不同的系外行星。 |
| 9. | The objects are considered fossil remnants of the swirling disk of debris that coalesced to form the solar system roughly 5 billion years ago
柯依伯带被认为是50亿年前形成太阳系的原行星盘的古老的残留物质。 |
| 10. | Large discs ? like that from which the solar system is thought to have formed ? might create gaseous giants farther away from the host star while smaller discs might allow such objects to form closer in
较大的盘? ?类似于认为形成太阳系的原行星盘? ?可能会产生距离主星稍远的气态巨星，而较小的盘可能会形成距离主星更近的天体。 |
