英语语法分析

The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.

难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。

Equally perplexing constituents of Allende are the refractory inclusions: irregular white masses that tend to be larger than chondrules.

阿连德陨石中同样令人困惑的成分是那些耐高温的内部物质：往往比陨石球粒要大的不规则白色块状物。

Because they are not metabolised, these molecules are referred to as "refractory".

因为这些分子不能被代谢，所以被称为“难解质”。