Electricity is one of the most important energy sources, and the quality of electricity is nearly correlative with our lives.
电能是最重要的能源之一,而电能质量与国民经济的各个部门以及人民的生活密切相关。
Coal is one of the most important energy sources in the world.
煤是世界上最重要的能源之一。
Canada is a net exporter of oil and natural gas, one of the most important sources of U. s. energy imports.
加拿大是一个石油天然气净出口国,是美国最重要的能源进口国之一。
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