I was intemperate in my youth.
我年少轻狂。
形容词intemperate的本意是,无节制的,放纵过度的,有时候会特指饮酒过度。因此,这句话意思相近的汉语表达还可以是,我少不更事,我年幼无知。它的反意词即是temperate,温和的,适度的,有节制的。
例句,
He is always temperate in his language. 他言辞总是很温和。
We should learn to be temperate in eating and drinking. 我们应该在饮食上有所节制。
Temperance can be a convenient disguise for fear. 温文尔雅以便掩饰胆怯。