以下是原文:A soapbox car (also variously known as a soapbox cart, and more...
especially in Australia, billy cart) is a motorless vehicle
capable of holding a driver (usually a child) built for the
purpose of racing or recreation. Propelled by gravity, soapbox
cars can reach upwards of 50 km/h (30 miles per hour).
Originally, soapbox cars were built from orange crates and
rollerskate wheels, but have grown more sophisticated over
time, with materials like aluminum and fiberglass being
utilized.In the United Kingdom a soapbox car is called a
buggy, trolley, cart or cartie. It is also sometimes called a
go-kart, although that more usually refers to a similar
vehicle with a motor. In Scotland they are described as a
bogie.
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