[qīng xǐng]
（清楚； 明白） clear-headed; sober
keep a clear [cool] head; keep sober-minded
保持清醒的头脑
The lessons learned at the cost of blood helped to sober us.
血的教训使我们的头脑清醒了。
（神志恢复正常） come to; come round; regain consciousness
He was perfectly sane when he committed the crime.
他犯罪时，神志十分清醒。
He apologized when he sobered up.
他清醒过来后表示道歉。