immature
adj. 发育未全的；（人）幼稚的，不成熟的；粗糙的
例句
She is emotionally immature.
她在情感上不成熟。
《柯林斯英汉双解大词典》
He said that we were emotionally immature.
他说我们在感情上是不成熟的。
His speech is immature, his vocabulary limited.
他讲话不成熟，词汇量也有限。
