陨石

Or arrived as part of a late-accreting veneer of water-rich meteorites, similar to the carbonaceous chondrites that we see today

另一种是来自一种后期聚集增生的富水陨星块体，与今天看到的碳质陨石相似

Normalized by chondrites and NASC, remarkable positive Eu anomalies are found.

与球粒陨石和北美页岩相比，Eu有较严重的正异常。

With the help of energy dispersive X-ray spectrometer installed in SEM large area chemical analytical data of the 23 chondrites were obtained from sections of these samples.

运用X射线能谱仪进行全视域元素成分面分析方法，获得了23个陨石的化学成分。

The measurement of TL sensitivity has produced new means of classification for 3 type of ordinary chondrites,CO,CV chondrites and eucrites.

诱导TL曲线的峰温和峰宽也与陨石的热历史有关。

Looking at these isotopes allows the chondrules to be dated, and they were formed 4.56 billion years ago.

观察这些同位素可以估算出陨石球粒的年龄，他们是在45.6亿年前形成的。

Work out how old the oldest chondrules are, and you know when the sun ignited.

得出最老的陨石球粒的年龄，你就可以知道太阳是什么时候开始燃烧的。

Once a merged mass of chondrules and dust got big enough, things started to happen.

一旦陨石球粒和灰尘聚合的数量变的足够大，有些事情开始发生了。

Local concentrations of chondrules were drawn together by gravity and, when they encountered each other, often merged.

局部聚集的陨石球粒由于引力而相互吸引，当他们碰到一起时，往往合为一体。

That chondrules formed in such quantities suggests that the heating which created them was widespread.

这么大量的陨石球粒的形成说明能使它们形成的热量的范围很大。

Like the chondrules themselves, most dust grains were created in the early solar system—in this case by bigger objects grinding against each other.

和陨石球粒他们一样，大部分灰尘创造于太阳系初期——这样的话，它们是较大物体相互摩擦产生的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。