naive

/naɪiv/

marked by or showing unaffected simplicity and lack of guile or worldly experience

Chinese meaning: 天真的；幼稚的

It was naive of him to believe that everyone would keep their promise.

他相信每个人都会遵守诺言，这太天真了。

The plan seems naive and unrealistic in the current economic climate.

在当前经济环境下，这个计划显得幼稚且不切实际。