1·Diamonds, an occasional component of rare igneous rocks called lamproites and kimberlites, have never been dated satisfactorily.
钻石是稀有火成岩（称为煌斑岩和金伯利岩）中偶尔出现的一种成分，其年代测定方法从未令人满意。
2·Igneous rocks do not contain fossils.
火成岩不含化石。
3·In geology, igneous rocks were once hot liquid.
译在地质学中，火成岩曾是炽热的液体。
4·Texture and structure of igneous rocks and classification.
岩浆岩的结构和构造岩浆岩的分类。
5·I wonder if there are further classifications of igneous rocks.
我想知道火成岩还有进一步的类型划分吗。
6·So eruption of volcanoes is one way of producing igneous rocks.
那么火山喷发是形成火山岩的一种方式罗。
7·Contrast the formation of intrusive and extrusive igneous rocks.
对比形成的侵扰和挤压火成岩。
8·The most common intrusive in the order of igneous rocks is granite.
在火成岩系列中最常见的侵入体是花岗岩。
9·Key points: texture, structure and classification of igneous rocks.
重点：岩浆岩的分类、结构和构造。
10·Describing igneous rocks with a high content of the alkali metal oxides.
描述有高含量碱金属氧化物的火成岩。