Though an ion engine could never lift a spacecraft out of Earth's gravity well.

尽管离子发动机不能使航天飞机很好地摆脱地球引力。

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An important longer-run possibility is that the underlying economic engine is running out of steam.

从长远看，一种重要的可能是，基础经济引擎正失去动力。

youdao

An important longer-run possibility is that the underlying economic engine is running out of steam.

从长远看，一种重要的可能是，基础经济引擎正失去动力。

youdao