请你把中文翻译成为英文
该理论认为，一般的想法，如对人或发红的想法，，存在人的心灵所产生的实体，它们可以存在于所有人的心中。
The theory that general ideas, such as the idea of man or of redness, exist as entities produced by the human mind and that they can exist in the minds of all men.