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1. 科学家说习惯之所以出现，是因为大脑一直在寻找可以省力的方式。

   kē​xué​jiā shuō xí​guàn zhī​suǒ​yǐ chū​xiàn, shì yīn​wèi dà​nǎo yī​zhí zài xún​zhǎo kě​yǐ shěng lì de fāng​shì.

   Scientists say habits emerge because the brain is constantly looking for ways to save effort.

   Source: CCMatrix