The stony meteorites are subdivided into two kinds: chondrites, and achondrites.

陨石和无陨石。

It turns out that the most likely source for Earth's water is a type of meteorite called a carbonaceous chondrite.

结果上的水最有可能的来源是一种叫做" 碳质陨石" 的陨石， 陨石是一种陨石的类别称。

The stone was of a type called a carbonaceous chondrite.

这块石头属于一种叫做碳质陨石的类型。

The rocks are carbonaceous chondrites, one of the rarest types of meteorites, rich in carbon.

这些岩石是碳质陨石，是最稀有的陨石类型之一，富含碳。

But only the carbonaceous chondrites contain water - as well as lots of carbon, if you couldn't tell from their name.

你从它的称中也可以得知它们带有很多的碳， 它们之所以带有水是因为它们是在太阳的雪线以外形成的。 此外它们的水中带有的氘的比例。

One type of asteroid called a 'carbonaceous chondrite' contains water molecules, and also their raw ingredients, oxygen and hydrogen.

一种称为“碳质陨石” 的小行星含有水子，以及它们的原始成氧和氢。

They said that they had found remnants of carbonaceous chondrites on the moon's far side in hyperspectral images in the visible and near-infrared range taken by the rover.

他们说，在月车拍摄的可见光和近红外范围内的高光谱图像中，他们发现了在月背面的碳质陨石残留物。