知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。with The proportion benefit you would like to established to your Screen’s brightness. Such as, if you'd like to alter the brightness to 60%, operate:ご利用ガイド個人情報保護方針ご利用規約・保証規定営業日・営業時間�