缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失）
const n = num.length;
，推荐阅读同城约会获取更多信息
В Финляндии предупредили об опасном шаге ЕС против России09:28
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Uniform regions (solid backgrounds, smooth gradients) get stored as large blocks. Detailed regions (edges, textures) get subdivided into smaller blocks. You end up with a compressed representation that preserves detail where it exists and simplifies where it can.