China has excess aluminium capacity because abundant hydropower and coal have cut the cost of the energy needed to produce the metal.
中国铝产能过剩，因为充足的水电和煤炭削减了生产这种金属产品所需的能源成本。
2
Meanwhile, the influence of metal speciation in rhizosphere on its bioavailability as well as the mechanism of mycorrhizal plant in toleranting excess metals were also discussed.
同时，讨论了根际金属形态对金属有效性的影响，及其与菌根植物金属抗性机理的关系。
3
Cobalt can be converted into complex ion by excess ammonia and then recovered as highly pure metal cobalt powder by replacing with zinc powder.