| 1. | The only apparent building process that the early earth scientists could detect was volcanic activity .
早期地质学家所能发现的唯一明显的构造作用就是火山活动。 |
| 2. | Evolution : small changes in the chemistry of the early earth gives rise to life
进化：早期地球赋予生命提升的小小的化学变化。 |
| 3. | Each tiny chamber in each rock on the early earth could have housed a separate experiment in molecular self - organization
早期地球的岩石上，每个小坑洞都可能各自进行分子自我组装实验。 |
| 4. | Tolbert ' s team wondered if similar chemicals might have formed in early earth ' s atmosphere , which at various times also contained methane
特尔伯特的团队想知道，类似的化学成分是否会在早期的地球上形成，因为那时的地球上也有甲烷。 |
| 5. | Air , rock and water were the only materials available on the early earth . the first life form must have been produced ( or created ) from these primitive materials
最近有些实验结果显示，矿物，这种岩石的基本成分，在形成生命的奇妙过程中，可能扮演举足轻重的角色。 |
| 6. | In 1995 , however , harvard university researchers uncovered evidence that convinced many people that co2 levels were too low to have kept the early earth warm
然而，美国哈佛大学的研究人员于1995年揭露的证据，让许多人相信当时二氧化碳的浓度还是太低，不足以使早期的地球保温。 |
| 7. | Although titan ' s methane almost certainly comes from a nonbiological source , that moon ' s similarities to the early earth could help reveal how greenhouse gases regulated climate in our planet ' s distant past
虽然土卫六上的甲烷几可断定为非生物源，但它与早期地球的相似之处，有助于解开远古时期温室气体如何调控地球气候之谜。 |
| 8. | The extreme conditions under which the bacteria live bear a resemblance to those of early earth , potentially offering insights into the nature of organisms that lived long before our planet had an oxygen atmosphere
细菌所生存的极端环境与地球早期的环境很相似，潜在提供了洞察那些早在地球形成有氧大气以前就存在的有机体特性的机会。 |
| 9. | Single crystals of zircon began to add new information about the early earth in the 1980s , when a few rare grains from the jack hills and mount narryer regions of western australia became the most ancient terrestrial material known at that time ? the oldest dating back almost 4 . 3 billion years
1980年代，在澳洲西部的杰克丘与纳瑞尔山区发现了几颗稀有的锆石结晶，定年结果可追溯到43亿年前，因此成为地球上已知最古老的物质。 |
