能源: the sources of energy; energy resources; energy source; energy◇能源短缺 energy shortage; 能源工业 energy industry; 能源构成 energysource composition; 能源管理 energy control; 能源合作 cooperation in the field
效率: productiveness; efficiency; productivity; workpiece ratio 短语和例子效率低 inefficient; 效率高 efficient; 提高效率 promote efficiency; 效率首屈一指 second to none in efficiency; 投资效率 the efficiency of investme