In English, there is an interesting expression: “comparing apples to apples.” It means that when making a comparison, the two things should be similar and relevant, rather than unrelated. The opposite is called “comparing apples to oranges.”
For example, when shopping at a mall, you should compare one pair of shoes with another in terms of size and style. You shouldn’t compare a pair of shoes with a hat to determine which is more expensive or which looks better. The former is an “apples-to-apples” comparison, while the latter is an “apples-to-oranges” comparison.
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