This allows you to make your checkout path a one-way process in which users cannot jump ahead until they've completed each step in turn.

这能让结帐过程成为单向过程，用户如果没能按顺序完成每个步骤，他将无法向前跳转。

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For countries that have lagged behind for so long, the temptation to move ahead in one jump is hard to resist.

对于那些长期落后的国家，一跃而名列前茅的诱惑难以抵御。

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