period of immaturity

例句：

1. 1. The young scientistwas very immature in his approachto the problem.
   这位年轻的科学家在处理问题时非常不成熟。
2. 2. The baby is stillimmature and needs extra care.
   这个婴儿还不成熟，需要额外的照顾。
3. 3. Thecompany's decision to cut back onexpenses was a sign of immaturity.
   公司决定削减开支，这是不成熟的表现。