cycle

Compared meaning: a bicycle (noun).

比较义项：自行车（名词）。

• bike

  The most common, informal word for a bicycle, used constantly in everyday spoken English, especially when talking about children's or personal bikes.

  “自行车”最常见、最口语化的说法，日常口语中使用频率最高，尤其用来谈论儿童自行车或个人的自行车。

  Kids love racing their bikes around the block after school.

  孩子们放学后喜欢骑着自行车绕街区比赛。

• cycle 本词

  A more formal, chiefly British word for a bicycle, most often seen in signs and compounds like cycle path or cycle rack rather than in casual talk.

  “自行车”较为正式的说法，主要用于英式英语，常出现在路牌和复合词中，如cycle path（自行车道）、cycle rack（自行车架），而不常用于随意的口语。

  The car park has a covered cycle rack for staff and visitors.

  停车场设有一个带顶棚的自行车架，供员工和访客使用。

• bicycle

  The full, neutral, standard word for the vehicle, common in both speech and writing; the clearest choice when precision or formality matters.

  指该交通工具的完整、中性、标准说法，口语和书面语中都常用；在需要准确或正式表达时是最清楚的选择。

  The law requires every bicycle to have a working front light at night.

  法律规定每辆自行车在夜间都必须配备一个能正常使用的前灯。

All three mean a bicycle. Bike is the most common, informal word. Bicycle is the standard, neutral word for speech and writing. Cycle is more formal, chiefly British, often seen in signs like cycle path. Cycle can also mean a repeating period; not compared here.

这三个词在“自行车”这一意义上很接近，但语气和地域用法不同：bike最口语化、最常用；bicycle是标准、中性的说法，书面和正式场合更常见；cycle则多见于英式英语，常出现在标牌或复合词中（如cycle path、cycle rack），语气偏正式。这里不比较cycle表示“周期、循环”（如洗衣机的洗涤周期）或作动词“骑自行车”的意思。