For some materials, such as oxide dispersion-strengthened alloys or directionally solidified eutectics, the usage seems to depend upon a particular author or group of authors. 对于一些材料而言，如氧化物分散强化的合金或者定向固化的低共熔混合物，其使用似乎依赖于一个特殊的创始人或者创始人团队。
Igneous rock that has solidified beneath the earth's surface. 已经在地表凝固的火成岩。
