Solid phase-change materials are already used to store data in optical memory disks.

固态相变材料已经用于在光储存盘中储存数据。

But, suddenly, remembering the experiment of the day before and that she seemed rather to have retained a certain optical memory of the time when she enjoyed her full reason, he wrote on the white wall a capital " L" and " M" .

但是，突然间，他想起了前一天的实验， 并且想起她似乎还保留着对她充分理智的那段时间的某种视觉记忆， 他在白墙上写下了一个大写的“L” 和“M” 。