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        ≮　is not less than　不小于号

        ≯　is not more than　不大于号

        ≤　is less than or equal to　小于或等于号

        ≥　is more than or equal to　大于或等于号

        %　 per cent　百分之…

        ‰　per mill　千分之…

        ∞　infinity　无限大号

        ∝　varies as　与…成比例

        √　(square) root　平方根

        ∵　since; because　因为

        ∴　hence　所以

        ∷　equals, as (proportion)　等于，成比例

        ∠　angle　角

        ⌒　semicircle　半圆

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