the contents of metal elements

• 金属含量

the contents of metal elements的用法和样例：

例句

1. Another application of biodegradation enhancement is the recovery of metals from ores and mining tailings with metal levels too low for smelting.
   促进生物降解的另一个应用是从矿石或金属含量很低的不能熔炼的矿渣中回收金属。
2. The result shows that the high metal contents of the residuum andhigh temperature of the gasifier are the main reasons for slagging and block up in the gasifier.
   结果表明，渣油中金属含量高及气化炉温度过高是气化炉结渣与堵塞的主要原因。