- 1瞬間的；即時發生的（偏書面、科學；日常多說 instant / immediate。物理「瞬時速度」也是這個字）
Instantaneous means happening at once — no wait you can notice. In careful and scientific English, an instantaneous change is one that takes, for practical purposes, no time. You will hear instantaneous reaction, instantaneous communication, instantaneous death in news and textbooks. Though actually, in ordinary talk people just say instant or immediate, and they are close. Instantaneous is a little stiffer, and scientists sometimes use it in a strict way: not ‘very fast’, but ‘at this exact instant’. talk about instantaneous speed — your speed at one pinpoint in time, not over a journey. So the tidy dictionary says ‘immediately’, and that is fair, but the word often carries a lab-coat or news-anchor feel.
From the word’s history
From New Latin īnstāntāneus, from Latin instans 'present, at hand'.
來自新拉丁文 īnstāntāneus，源自 instans「當下的」。
組成From New Latin īnstāntāneus, from Latin īnstantem — the ‘standing here, present, urgent’ root that also gives English instant.
同家族的字
- instantthe everyday adjective and noun this learned form sits on
- instantaneouslythe adverb
- instantlythe everyday adverb, same idea in plainer clothes
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，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。
instantaneousadj/ɪnstənˈteɪni.əs/
- 1
Occurring, arising, or functioning without any delay; happening within an imperceptibly brief period of time.
- This instantaneous motion is supposed by you, to be infinitely swift.
- However, no lovers in romance ever cemented a more inſtantaneous friendſhip.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。