ripe的反义词是什么

ripe的反义词是 immature

例句

1、

His speech is immature， his vocabulary limited

他说话很幼稚，使用的词汇有限。

2、

He was a young lad， very green， very immature.

他还是个毛头小子，幼稚得很，一点都不成熟。

3、

Because of the immunity of the immature insects， it's important to spray regularly.

由于幼虫对药物有免疫力，因此必须经常喷药。