She says the boat would be shaped like a capsule, powered by a small nuclear engine, and though there would be no sail, it would have a mast to hold a camera.

她说船将被制成胶囊形，由一个小型核动力引擎驱动，尽管不会有帆，但船上会有一个固定照相机的桅杆。

youdao

The rocket USES a nuclear engine, a technology that was under serious investigation for a long time.

火箭采用的则是人们长期以来一直认真研究的核动力引擎技术。

youdao

The rocket uses a nuclear engine, a technology that was under serious investigation for a long time (and may yet see its day in space).

宇航员的火箭使用的是核动力引擎，该技术长久以来都处在认真研究之中（但至今仍未能投入实用）。

youdao

Unfortunately, the easiest way to make a more efficient engine, nuclear-electric propulsion, is controversial.

ECONOMIST: Galileo and Jupiter

While the ship will not travel at warp speed, with an ion propulsion engine powered by a 1.5GW nuclear reactor, it can travel at a constant acceleration so that the ship can easily get to key points of interest in our solar system.

MSN: Spaceship Enterprise in 20 years? Beam me up!

Every night, it shuts down its engine for eight hours to recharge its batteries with its nuclear generator.

NEWYORKER: The Martian Chroniclers