There are no tricks, a trolley has an accumulator and a motor.
这不是什么把戏，在这推车装有一个蓄电池和一个发动机。
2
And the accumulator is a passive system that just operates automatically based on a significant loss of pressure in the primary system.
蓄电池是一个被动的系统，只会在主系统出现了重大的，压力损失的情况下才会自动运行。
3
His big invention was something called an "orgone energy accumulator", a box about the size of a telephone booth which collected good atmospheric energy.