作为javascript开发，简述bootstrap网格系统（grid system）？
Bootstrap网格系统是一种用于创建响应式布局的工具，它允许开发者在不同设备和屏幕尺寸上创建灵活的布局。Bootstrap网格系统基于12列，可以创建各种复杂的布局，包括水平和垂直居中、响应式列和嵌套网格。 [2023-11-09 00:55:27 | AI写代码神器 | 56点数解答]
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