Books relieve the human mind of long-term storage rents, freeing it up for other things, while language compresses awkward hand-waving communication into a thrifty, energy conserving voice.

• 书本使得为储存信息长期占用的人脑得到解脱，使它能够去做些别的事情，而语言把笨拙的手势交流成功地压缩为保存声音的能力。