translation.en: XL: Nowadays, people in the lab and people in other groups all over the world are using similar methods to activate or edit memories, whether that's old or new, positive or negative, all sorts of memories so that we can understand how memory works.
translation.zh: 刘旭：如今，全世界的科研人员 和其它工作者 都在用相似的方法来激活和改写各种记忆， 无论是旧的记忆、新的记忆，积极的或消极的， 这样我们便能够更好地理解 记忆的运作。