Standard

翻译标准

Remember to use <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Read-Search-Ask</a> if you get stuck. Try to pair program. Write your own code.

如果你遇到了问题，请点击 <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>帮助</a>。

<strong>Note</strong><br>You can return the array with its elements in any order.

<strong>注意：</strong><br>返回数组中的元素顺序不会影响测试结果。

at your own risk => 风险自担

User Story => 需求

viewport => 视窗