Today we're going to discuss the history of the bicycle. Although many people think of the bicycle as a relatively modern invention, its origins date back to the early 19th century. The first two-wheeled vehicle, called the 'Draisine' or 'running machine', was invented by Karl von Drais in 1817. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable and difficult to ride. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels was introduced, making cycling much safer and more popular.
❓ '안전 자전거'는 이전 디자인과 무엇이 달랐나요?
A. 앞바퀴에 페달이 달려 있었다.
B. 체인으로 구동되었으며, 크기가 같은 두 개의 바퀴를 가지고 있었다.
C. 그것은 전적으로 나무로 만들어졌다.
D. 라이더들이 발로 땅을 밀어야 했다.
✅ 正确答案
It was powered by a chain and had two equal-sized wheels.