求翻译：生物质能一直是人类赖以生存的重要能源之一，它仅次于煤炭、石油和天然气而居于世界能源消费总量的第四位，在整个能源系统中一直占有重要的地位。是什么意思？

Biomass has always been an important energy source for mankind's survival is one, it second only to coal, oil and gas among the world's total energy consumption of fourth place in the whole energy system has played an important role.

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The biological mass energy always is one of humanity's livelihood important energy, it is only inferior to the coal, the petroleum and the natural gas resides in the world energy expense total quantity fourth, always holds the important status in the entire energy system.

Biomass energy has been one of important energy of human survival, it is second only to coal, oil and natural gas leads the world in the fourth of the total energy consumption, has occupied an important position in the energy system as a whole.

Biomass has always been an important energy source for mankind's survival is one, it second only to coal, oil and gas among the world's total energy consumption of fourth place in the whole energy system has played an important role.