白云还是急脾气呀!有没有看过这本书-Thinking, Fast and Slow？

人脑获取知识的进展，你的意识层面是不知道的。很多时候你在进步而不自知，不知不觉中你已在进步了。

对于native English speaking people, they have finished their language skills by using system 2 in their early age, and now speaking English is mostly using their system 1, except creative writing, etc.

In contrast, we are still catching up the system 2 process.  Since we're learning it as second language as adults, it makes it more challenging.  The language learning area in our brains are lossing sensitivity as we grow into adulthood.  That is just unfortunate :(