It was George who had the idea of stationing Stuart inside the piano to push the key up the second it was played.

因此乔治想出一个主意，让斯图亚特站到钢琴里，当他该弹这个键时，就让斯图亚特去推它。

Its ion thrusters put out less force than it takes to push a single key on a keyboard, but it accelerated to over 11 km per second by firing that tiny engine for nearly six years.

它的离子推进器产生的力比按下键盘上的一个键要小，但是通过点燃这个微型发动机将近六年，它加速到每秒 11 公里以上。