Task 1：概覽句

IELTS band descriptors for Task 1 mention one feature by name: the overview. An overview is one or two sentences that state the main pattern of the whole chart — what goes up, what goes down, what dominates — without quoting any specific figures. A response with accurate details but no overview is capped at band 6 for Task Achievement, while a clear overview is the single fastest route to band 7. The overview usually starts with a signpost word such as 'Overall,' and answers one question: if a reader saw nothing but your sentence, would they know the chart's story?

雅思 Task 1 的評分標準中點名提到一個要素：概覽（overview）。概覽是一到兩句話，概括整張圖表的主要模式——什麼在上升、什麼在下降、什麼佔主導——並且不引用任何具體數字。細節準確但沒有概覽的作文，任務完成度最高只能拿 6 分；而一個清晰的概覽是通往 7 分最快的路徑。 概覽通常以 'Overall,' 這樣的路標詞開頭，並且只回答一個問題：如果讀者只看你這一句話，能否知道圖表講了什麼故事？

To find the overview, ignore individual bars and points. Ask three questions in order: (1) What is the overall direction — rising, falling, or stable? (2) Which category is highest or lowest for most of the period? (3) Is there a crossover — a moment where two lines swap positions? Any two of these answers, joined in one sentence, make a complete overview. Two common mistakes to avoid: copying a number into the overview ('rose to 45%') — numbers belong in the detail paragraphs — and listing every category one by one, which is description, not overview.

要找出概覽，先忽略單個柱形和數據點。按順序問三個問題：（1）總體方向是什麼——上升、下降還是平穩？（2）在大部分時間裡，哪個類別最高或最低？（3）有沒有交叉點——兩條線互換位置的時刻？任選其中兩個答案，合成一句話，就是一個完整的概覽。 要避免兩個常見錯誤：把數字寫進概覽（'rose to 45%'）——數字屬於細節段；以及把每個類別逐一羅列，那是描述，不是概覽。