The bicycle has its own unique characteristics and cyclists are not a ________group: they are people of a wide age range, cycling ability, experience, and traffic judgement, who are cycling for a variety of different reasons.
句意: 自行车有自己独特的特点, 骑自行车的人并不是一类群体,他们是年龄范围广、 骑自行车能力强、 经验丰富、 对交通判断能力强的人, 他们骑自行车的原因多种多样。 homogeneous均匀的; 同类的。 collective集体的; 共同的。primitive原始的; 远古的。 traditional传统的; 惯例的。