Copy Two-dimensional arrays in Javascript : 

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Hello everyone, I met a problem when coding in Javascript, and I'm seeking for a solution for "What should I do with a Two Dimensional Array if I want copy each line of them and make them a new Two-Dim array?" Thx a lot if any one can help~ Here is the format of this two-Dim array:
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    > {"localTrain":"T7", "TC":"2", "TimeSheet":[
    > ["01","London","BXP","T7","1632","1640"],
    > ["02","Shanghai","QWE","T7","1200","1240"],
    > ["03","LosAngeles","DFG","T7","1300","1340"],
    > ["04","NewDelhi","VGH","T7","1400","1440"],
    > ["05","Sydney","SAW","T7","1500","1540"],
    > ["06","Tokyo","SAT","T7","1600","1640"],
    > ["07","Seoul","BBT","T7","1700","1740"],
    > ["08","CapeTown","OOP","T7","1800","1840"],] }

And they should be look like this:

    > {"localTrain":"T7", "TC":"2", "TimeSheet":[
    > ["01","London","BXP","T7","1632","1640"],
    > ["01","London","BXP","T7","1632","1640"],
    > ["02","Shanghai","QWE","T7","1200","1240"],
    > ["02","Shanghai","QWE","T7","1200","1240"],
    > ["03","LosAngeles","DFG","T7","1300","1340"],
    > ["03","LosAngeles","DFG","T7","1300","1340"],
    > ["04","NewDelhi","VGH","T7","1400","1440"],
    > ["04","NewDelhi","VGH","T7","1400","1440"],
    > ["05","Sydney","SAW","T7","1500","1540"],
    > ["04","NewDelhi","VGH","T7","1400","1440"],
    > ["06","Tokyo","SAT","T7","1600","1640"],
    > ["06","Tokyo","SAT","T7","1600","1640"],
    > ["07","Seoul","BBT","T7","1700","1740"],
    > ["07","Seoul","BBT","T7","1700","1740"],
    > ["08","CapeTown","OOP","T7","1800","1840"],
    > ["08","CapeTown","OOP","T7","1800","1840"],] }