线图 (Line Graph) - 趋势描述

线图是 Task 1 最常见的图表类型之一，用于展示数据随时间的变化趋势。

线图特点

• 展示时间序列数据的变化
• 通常包含多条线进行比较
• 重点描述趋势（上升/下降/波动/稳定）

核心词汇

1. 上升趋势

2. 下降趋势

3. 稳定/波动

4. 修饰程度

高分句式

描述起点和终点

• The number of visitors started at 1,000 in 2010 and reached 5,000 by 2020.
• Unemployment stood at 8% in January and fell to 5% by December.

描述趋势

• There was a steady increase in production throughout the period.
• The figure experienced a sharp decline before recovering.
• Sales saw a fluctuation between May and August.

描述最高/最低点

• Consumption peaked at 500 units in July.
• The rate hit a low of 2% in 2015.
• Temperature reached a maximum of 35°C.

比较多条线

• While A increased, B showed the opposite trend.
• A rose more sharply compared to B during this period.
• By the end of the period, A had overtaken B.

范文结构

开头段 (1-2句)

改写题目，说明图表类型和时间范围。

The line graph illustrates changes in the consumption of three types of beverages in a European country between 1990 and 2010.

概述段 (2-3句)

总结最重要的趋势。

Overall, coffee consumption rose significantly over the period, while tea drinking declined. Meanwhile, juice consumption remained relatively stable.

细节段 (5-8句)

按趋势或时间顺序详细描述。

In 1990, tea was the most popular beverage, with around 200 cups per person per year. However, this figure dropped steadily, reaching only 100 cups by 2010. Conversely, coffee consumption climbed from approximately 50 cups to 150 cups over the same period.

常见错误

[!WARNING]

• ❌ 描述每一个数据点（太琐碎）
• ❌ 忽略整体趋势（缺乏概括）
• ❌ 添加主观解释（如 "because 经济增长"）
• ❌ 遗漏数据单位