In 1700, a spinster with a pedal-driven spinning wheel might take 200 hours to produce a pound of yarn.
在1700年，一位拥有踏板驱动的纺车的未婚的老女人可能需要200个小时才能生产出一磅纱线。
2
In 1700 a spinster with a pedal-driven spinning wheel might take 200 hours to produce a pound of yarn.
在1700年，一个未婚的老女人用一个脚踏板驱动的纺织机或许需要200小时来生产1磅的纱线。
3
If I am going to buy a car, I'm going to assume they all have wheels that rotate forward and backward on demand and they have a steering wheel, a gas pedal, and a brake pedal that work.