an old-fashioned bicycle with a very large front wheel and a much smaller back wheel
高轮自行车, 前轮大后轮小的自行车
骑高轮自行车需要练习和平衡。
a vehicle with two wheels that we ride by pushing its pedals with our feet
自行车, 脚踏车
any of the circular objects typically found under vehicles like cars, bicycles, buses, etc., used to make movement possible by turning
轮子, 轮胎
receiving a lot of love and attention from many people
受欢迎的, 受喜爱的
a small, flat piece of metal issued by a government and used as money
硬币, 钱币
to resemble a thing or person in appearance
看起来像, 类似于
新学生看起来像她的姐姐；他们有相同的眼睛和微笑。
a US coin worth one cent, or one hundredth of a dollar
便士, 分
a former British coin worth one-quarter of an old penny, withdrawn in 1961
法寻, 一种于1961年停止流通的英国旧硬币，价值为旧便士的四分之一
在十进制之前，法寻是英国货币的最小单位。
an old type of bicycle that is moved forward by pedal
早期自行车
博物馆展出了一辆19世纪的老式自行车。
a flat part of a bicycle or machine that is pushed with the foot to make it move or operate. It is typically circular and part of the mechanism that drives motion
踏板, 脚蹬子
我自行车上的踏板松了，需要拧紧。
to keep something in a stable and even position, typically by adjusting or redistributing weight
平衡, 保持平衡
difficult to do or handle and requiring skill or caution
棘手的, 复杂的
解决一个棘手的谜题需要仔细的思考和解决问题的技巧。
to sit on open-spaced vehicles like motorcycles or bicycles and be in control of their movements
骑, 驾驶
capable of destroying or causing harm to a person or thing
危险的
他在高速公路上以危险的速度行驶。
a person who rides a bicycle, motorcycle, horse, or other animal
to quickly move from a higher place toward the ground
跌倒, 掉落
used to indicate that despite a certain fact or situation mentioned in the first clause, the second clause follows
尽管, 虽然
尽管下着雨，他们还是决定去远足。
making us feel interested, happy, and energetic
令人兴奋的, 刺激的
音乐会令人兴奋，有我喜欢的乐队带来的精彩表演。
to be the cause of something
导致, 引起
a line of metal rings or links connected together, often used for fastening or pulling
链子, 链条
happening infrequently or uncommon in occurrence
罕见的, 稀有的
to gather together things from different places or people
收集, 搜集
no longer used, supported, etc. by the general public, typically belonging to an earlier period in history
过时的, 老式的
他对人际关系的看法在当今世界有点过时。
