rack one 's brains in vain
In Chinese, Pinyin is w ǎ ngy ò NGX ī NJ ī, which means to waste one's mind. It's from the book of Daoists.
The origin of Idioms
Zhu Xi of the Song Dynasty wrote in the book of Daoists in Gansu: "it's also a waste of effort to collect books in suoyun's library. It's better to learn to sit still and read old books, so as to get rid of the worldly dirt. "
Idiom usage
It's a waste of time.
Examples
Chapter 16 of Jing Hua Yuan written by Li Ruzhen in Qing Dynasty: "once I closed my eyes, I realized that everything was in vain before, but I had a spring dream."
Chinese PinYin : wǎng yòng xīn jī
rack one 's brains in vain
To raise the spirits and clear the turbid. jī yáng qīng zhuó
cannot distinguish colours due to a confused mind. kàn zhū chéng bì