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Instantaneously means ‘in a moment; with no wait you can notice’. It is the adverb of instantaneous, so it has the same slightly formal, textbook feel.
Instantaneously means 'in a moment; with no wait you can notice'Instantaneously的意思是『瞬間；沒有你能察覺到的等待』 It is the adverb of instantaneous它是instantaneous的副詞形 so it has the same slightly formal, textbook feel所以帶著同樣有點正式、教科書式的感覺
A light can go out instantaneously; a can spread instantaneously online.
A light can go out instantaneously燈可以instantaneously（瞬間）熄滅 a rumour can spread instantaneously online謠言也可以在網路上instantaneously（瞬間）傳開
Though actually, most people say instantly or immediately, and nobody looks under-educated for it. This longer word shows up when a writer wants to sound precise, or a little dramatic.
Though actually不過實際上 most people say instantly or immediately大多數人會說instantly或immediately and nobody looks under-educated for it這樣說也不會顯得沒學問 This longer word shows up when a writer wants to sound precise, or a little dramatic這個比較長的字，會在作者想顯得精確，或有點戲劇性的時候出現
In science, it can mean ‘at that exact instant’, not merely ‘very soon’. Do not stretch it to mean ‘very quickly but after a while’ — if you had to wait, instantly is already a bit of a fib, and instantaneously is a bigger one.
In science在科學領域裡 it can mean 'at that exact instant'它可以指『就在那個瞬間』 not merely 'very soon'而不只是『很快』 Do not stretch it to mean 'very quickly but after a while'不要把它硬拗成『過一陣子後很快』的意思 if you had to wait, instantly is already a bit of a fib如果你有等待，instantly就已經有點言過其實了 and instantaneously is a bigger oneinstantaneously就更誇張了
組成instantaneous + -ly.
同家族的字
- instantaneousthe adjective this adverb is built from
- instantlythe shorter, everyday adverb with the same job
- instantthe everyday word underneath both
原始詞典資料1 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。
instantaneouslyadv
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Without any delay; in an instantaneous manner.
- How quick the eye and hand to catch him [the ruffed grouse] when he rises from the underbrush and is out of sight in the wood before the untrained sportsman stops him with what is little more than a snapshot, so instantaneously must all be done!
- Under the guise of being “online” and capable of disseminating news instantaneously (known colloquially as “retweeting”), being active on Twitter, for media workers, gives the effect of fulfilling one’s occupational duty as well as all the parts of professional upkeep that, in the physical world, involve being in the right rooms, overhearing the right things, and more or less maintaining appearances.
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。