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To be the ultimate authority or standard in judging something, especially in matters of taste, fairness, or correctness.
对于这件事，我的眼睛就是尺，没有商量的余地。
In this matter, my eyes are the ruler, and there's no room for negotiation.
This phrase emphasizes the speaker's confidence in their judgment and their unwillingness to compromise.
Use this phrase when you want to emphasize that your judgment is final and should not be questioned.
The phrase combines 'eyes' (眼睛) with 'ruler' (尺), metaphorically suggesting that the speaker's vision is the ultimate measure or standard.
This phrase is often used to assert one's authority or expertise in a particular area, such as art, design, or personal preferences. It can come across as confident or even arrogant, depending on the context.