经过一夜的睡眠，我现在感到非常清醒。
jīngguò yīyè de shuìmián ， wǒ xiànzài gǎndào fēicháng qīngxǐng 。
After a night's sleep, I feel very clear-headed now.
喝了咖啡之后，我变得更加清醒。
hēle kāfēi zhīhòu ， wǒ biàndé gèngjiā qīngxǐng 。
I became even more awake after drinking coffee.
他在考试前保持清醒状态。
tāzài kǎoshì qián bǎochí qīngxǐng zhuàngtài 。
He stayed clear-headed before the exam.