Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, called the 'draisine', was invented in 1817 by a German baron. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was very uncomfortable due to its solid rubber tires and rigid frame. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels became popular, making cycling much safer and more efficient. This design is the basis for modern bicycles.
❓ 강의에서 언급된 벨로시페드의 주요 단점은 무엇이었나요?
A. 페달이 없었다.
B. 타이어와 프레임 때문에 불편했어요.
C. 그것은 크기가 다른 두 개의 바퀴를 가지고 있었다.
D. 생산 비용이 너무 비쌌다.
✅ 正确答案
It was uncomfortable because of its tires and frame.