以内

• 拼音: yǐ nèi
• 汉字拆解: 以 = pictograph suggesting use or means; 内 = 冂 (enclosure radical) + 人 (person), meaning inside or interior

含义

Within; inside (a specified limit or range). Used to indicate that something falls within a particular boundary, time frame, or quantity.

Always follows a quantity or noun indicating the upper limit: 一周以内 (within one week), 一公里以内 (within one kilometre), 预算以内 (within budget). Often appears in formal and official contexts. Contrasts with 以外 (outside of/beyond) and 以上/以下 (above/below).

例句

1. 请在三天以内把报告发给我。
2. 学校规定，学生必须在晚上十点以内回到宿舍。
3. 公司承诺，所有订单将在一周以内发货。

用法指南

语境: everyday, official, business

语气: neutral

正确说法

• 请在规定时间以内完成任务。(Please complete the task within the specified time.)
• 两公里以内有好几家餐厅可以选择。(Within two kilometres there are several restaurants to choose from.)

错误说法

• 在'以内'后面再加'里面'或'之内' (Don't say 一周以内里面 or 一周以内之内 — 以内 already means 'within', so adding 里面 or 之内 is redundant)

起源与历史

A compound of 以 (within; by means of) and 内 (inside; interior). Together they express being within a boundary or upper limit.

文化背景

世代: All ages

社会背景: Universal