1. 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。
2. 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。
3. It also can be used as refractory materials. 也可以作为耐火材料之用。
4. Some refractory organics are toxic to aquatic life. 一些难降解有机物是有毒的水生生物。
5. The company now has a refractory metal processing equipment. 公司现在拥有难熔金属的加工设备。