如果你想用英语表达“我立马清醒了”，你可以说 "I instantly woke up"。这个短语的来源可能源于人们在睡眠中突然清醒时的感觉。例如：

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- I was having a strange dream when I suddenly heard a loud noise. I instantly woke up and reapzed that it was just the alarm clock.
- I was feepng very drowsy after a long day at work, but as soon as I got into bed I instantly woke up and felt refreshed.


在中文中，这个短语的翻译可能是：

我正在做一个奇怪的梦，突然听到一声巨响。我立马清醒了，意识到那只是闹钟。
我在一天长时间工作之后感觉很困倦，但是一睡到床上我立马清醒了，感觉神清气爽。