比如，“纽约的理查德进攻失败”，就是一种按正确顺序回忆起可见光颜色(红、橙、黄、绿、蓝、靛、紫)的记忆方法。
"Richard of York Gave Battle in Vain," for example, is a mnemonic for recalling the colors of the visible spectrum in the right order (red, orange, yellow, green, blue, indigo, and violet).
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