too young

基本解释

Or he could be too young to know how to use it.
或者他都可能太年轻而不知道怎么用它。
That he would propose some day she had never doubted, for she was too young and too spoiled ever to have known defeat.
她从未怀疑他有一天会向她求婚，因为她实太年轻太娇惯了，从来不懂得失败是怎么回事。
But costs and culpability did not seem to be the main concern of most Londoners, especially those too young to remember the last serious flurry.
但是，成本和惩罚似乎对大多数伦敦人来说并不是主要问题，特别对这些太年轻而不记得上次严重的降雪。

Some parents take their children's birthday parties very seriously, even when the child is too young to fully understand the celebration.
Unfortunately, you people are too young to have experienced this, but I've experienced this and you can talk to your parents.
不巧的是，你们还太年轻,可能不会有这些经历，但是我亲身经历过,你可以找父母聊聊。
耶鲁公开课 - 金融市场课程节选
And I remember I didn't know what FAO Schwarz was because I was too young,
我记得我都不知道FAO Schwarz是什么，因为我当时很小。
FAO Schwarz的回忆 - SpeakingMax英语口语达人

He was too young to not know English, it takes 2 years to get Medicare.
FORBES: Medicare Has Stopped Paying Bills For Medical Diagnostic Tests. Patients Will Feel The Effects