要富集成矿只需保持长期的层间循环.Concentration of ore would simply require prolonged interstratal migration.这类矿床表现为一度广泛分散的物质非常高度地富集起来.Such deposits represent very great concentration of materials once widely dispersed.初步的化学分异使铀富集.Primar...
Despite his unconventional methods, he has inspired pupils more than anyone else.尽管他的方法不同寻常，但他给予学生的激励比其他人都要多。There may be alternative methods of substantiation other than written records.除书面记录外，可能还有其他方法可以证实。Traditional s...