Sobriety is one of the Ghost Festival, demons, nature is capable of warding off evil into willow.
清明是鬼节之一，百鬼出没，插柳自然是辟邪了。

He was indeed a thoughtless, giddy youth, with little sobriety in his manners, and less in his countenance.
他确实是个轻率，浮躁的少年，举止随便，嬉皮笑脸。

They must really be cracking down on drunk driving this month. I saw three sobriety checkpoints on my way home. The guy in front of me also failed the breathalyzer test and I saw him getting arrested. Sucks for him.
这周好像真的加强酒后驾车的监督，回家的路上已经看到3个酒后驾车检查站。看见在我前面的那个男的被检查到喝酒而被抓了。真是可惜。