瞬间 in English

moment

瞬间 :
1. momentary
2. moment

Relative explainations:
<flashiness> <jiffy> <jiff> <wink> <in a pig's whisper> <split second> <trice> <instant> <twinkle> <twinkling> <momently> <instantaneous> <instantaneousness> <breathing> <sand> <second>

Examples:
1. 在那一瞬间, 她没有认出绑架她的人。
At that instant she did not recognize the man that had kidnapped her.
2. 在爆炸的瞬间,整个城市在沉睡中。
At the instant of the explosion, the whole city was in sound sleep.
3. 瞬间短暂的时间跨度；一会儿
A short space of time; a moment.
4. 由于光速极快，我们几乎能在开灯的那一瞬间就看见电灯亮起来。
Because of the great speed of light, we see a lamp light up almost at the exact moment we turn it on.
5. 他瞬间满脸通红.
A blush suffused his cheeks.

"瞬间"的翻译有很多，可以参看下文：
以下各句都可译作[他瞬间即回。]
instant: He will be back in an instant.
moment: He will be