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If something is half-hourly, it happens every thirty minutes. A half-hourly bus is not a bus ride that lasts thirty minutes — it is a bus that comes about every half-hour. You see this word on : trains, news, checks, bells. You can put it in front of a noun (a half-hourly service) or after a verb (the nurse checked half-hourly). It is a practical, slightly official word. Friends chatting would more often say “every half hour” or “every thirty minutes.”
每半小時一次的
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法,原文照列,我們還沒有寫成教學內容。上面的說明才是我們自己寫的;有些用法可能上面已經講過了。
half-hourlyadj
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Once every half-hour, every 30 minutes.
- a half-hourly train service
- A new half-hourly service between Stratford [Greater London] and Meridian Water was introduced on 9 September by Greater Anglia.
half-hourlyadv
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At intervals of a half-hour, every 30 minutes.
- Take this medicine half-hourly.
資料來源:英文維基詞典 English Wiktionary(CC BY-SA 4.0)。 原文照列,未經改寫。