There wouldalso be the requirement of a reliable, steady supply of energy, so theuse of radioisotope thermoelectric generators (RTGs) would be preferred.

同时它应该具备可靠、稳定的能源供应，最好能够使用放射性同位素热电发生器(RTG)。

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RTGs power many space missions — including NASA's Cassini and New Horizons probes — as the slow decay of small pellets of radioactive material produces heat that can be turned into electricity.

RTG已为许多太空任务提供动力，包括美国宇航局的“卡西尼号”和“新视野”探测器。在放射性物质的小球衰退过程中可以产生出热量，从而将其转化为电能。

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The Aggregate Balance has been disclosed on a virtually real time basis since December 1996, when the RTGS system was launched.

自从1996年十二月即时支付结算系统推行以来，总结余数字实质上已即时公布。

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Europe has no expertise with RTGs - the Americans have, and Cassini carries three to provide 700 watts to its systems.

BBC: NEWS | Science/Nature | Europe tells US: 'Come to Europa'

This is a plutonium-driven device that produces power far more efficiently than the traditional Radioisotope Thermoelectric Generators (RTGs) used hitherto on space missions, such as on Cassini.

BBC: 'Boat' could explore Saturn moon

"I'd much rather do this with RTGs, " said Professor Southwood.

BBC: NEWS | Science/Nature | Europe tells US: 'Come to Europa'