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  1. Oxford Dictionary

    thirtieth

    • IPA[ˈθəːtɪɪθ]

    英式

    • ordi
      constituting number thirty in a sequence; 30th；each of thirty equal parts into which something is or may be divided

    • noun: thirtieth, plural noun: thirtieths

    • 釋義

    ordi

    • 1. constituting number thirty in a sequence; 30th her thirtieth birthday his flat is on the thirtieth floor
    • 2. each of thirty equal parts into which something is or may be divided a thirtieth of a second