fluctuate多益
多益新增字・持續校對中，發現問題歡迎用頁尾回報
波動；起伏不定·情緒起伏不定
多益核心字，形容數值忽高忽低
Oil prices have fluctuated so much this year that drivers never know what to expect at the pump.
今年油價波動劇烈，讓開車族每次加油都摸不著頭緒。
一個畫面：指針忽上忽下
指針搖擺指針忽左忽右，抓不到固定位置
數字起伏數字忽高忽低，沒有固定走勢
心情浮動心情忽好忽壞，難以捉摸
義項
股價起伏B2verb波動；起伏不定
Gas prices have fluctuated sharply since the start of the year, making it hard to plan a monthly budget.
今年以來油價劇烈波動，讓人很難規劃每月的預算。
fluctuate sharplyfluctuate wildly
心情搖擺B2verb情緒起伏不定
Her confidence tends to fluctuate depending on how a presentation goes.
她的信心會隨著簡報表現好壞而忽高忽低。
tend to fluctuate
片語
fluctuate wildly劇烈搖擺 →劇烈忽高忽低地波動
fluctuate sharply陡然起伏 →短時間內明顯起伏
tend to fluctuate反覆不定 →經常忽高忽低，難以預測
你會不會這樣說？
Gas prices have ___ sharply this year. (fluctuated / fluctuation)
看答案
fluctuated
have 後接過去分詞 fluctuated，構成現在完成式。
'Her confidence tends to fluctuate depending on how a presentation goes.' 這裡的 fluctuate 最接近：(A) 起伏不定 (B) 突然消失
看答案
(A)
此句描述信心忽高忽低，對應「情緒起伏不定」的義項。
字族
fluctuation 波動；起伏（名詞）
順路看看
vary — 同樣表示「改變」，但語氣中性，不強調忽高忽低stable — fluctuate 的反義，表示穩定不變steady — 強調穩定持續，常與 fluctuate 相反使用多益練習
本區為多益情境練習，與上方釋義獨立編寫
情境例句
客服工作量
The number of support requests fluctuates throughout the week.
客服支援請求的數量在一週當中起伏不定。
簡報準備
His confidence fluctuated as he rehearsed his presentation for the management team.
他在排練給管理團隊的簡報時，信心忽高忽低。
詞族
fluctuate verb 波動；起伏不定・fluctuation noun 波動；起伏・fluctuating verb (present participle) 波動；起伏不定（現在分詞）
四選一
Daily call volumes can ____ considerably during a product launch.
看答案
fluctuate
情態助動詞 can 後接原形動詞，因此選 fluctuate。fluctuation 是名詞；fluctuating 是現在分詞；fluctuated 是過去式或過去分詞，都不能直接放在此處的 can 後面。
同義改寫
The number of support requests fluctuates throughout the week. → The number of support requests rises and falls throughout the week without a fixed pattern.
rises and falls 加上 without a fixed pattern，保留數量反覆增減且沒有固定規律的意思。
His confidence fluctuated as he rehearsed his presentation for the management team. → He repeatedly felt more confident and then less confident as he rehearsed his presentation for the management team.
以反覆感到較有信心、又較沒信心，表達原句中信心忽高忽低的變化。