题目内容
They used a trail-a-bike for shopping trips. Pulling the trailer loaded with groceries was like a breeze (轻而易举的事).
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A most arduous part of their experiment came as they were leaving Australia. They had a lot of luggage to carry and, meanwhile, two children to take care of.
Living without a car, they achieved better physical fitness from extra walking and cycling gained a new perspective of the place they lived.
There were risks involved in riding a bike in traffic, being in strange train stations, waiting at bus stops.
Since their return to the USA, they have continued their practice of living car-free and more sustainably.
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