正常: normal; regular; average 短语和例子恢复正常 return to normal; 脉搏正常 have a normal pulse; 运转正常 function normally; 情况很正常。 things are quite normal.; 正常报废 normal abandonment; normal retirement; 正常存货 nor
铅: 铅名词1.(金属元素) lead (pb) 短语和例子废铅 scrap lead; 含银铅 argentiferous lead; 软铅 soft lead; 重得像铅。 it's as heavy as lead.2.(铅笔心) lead (in a pencil); black lead
The plumbum of ores have some characteristics of the plumbum of earth ' s mantle and some characteristics of the plumbum of up per earth ' s crust 阿克提什坎金矿床不同地质体铅同位素特征表明，矿床铅不是单一来源的正常铅，而是混合型多来源的异常铅。
