重点回顾了20世纪放射性同位素电池的研发历史和空间发射现状；
This paper retrospects to the developing history and usage status of radioisotope thermoelectric generator (RTG) used in space in the 20th century.
太阳能电池板将提供电力，而放射性同位素加热器单元能够经受火星的严寒气候。
Solar panels will supply power and radioisotope heater units will help it withstand the extreme cold on Mars.
这意味着要建造一座同内置的同位素一样长寿的电池就须建得非常大。
This means that to build a battery that can last as long as the isotope inside, they must be built larger.
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