{ antialias: true }：开启了抗锯齿，让边缘光滑，不再有毛刺。
Comment from r/linuxmint"It's more likely they will put a disclaimer on their website: "not for use in California."
，这一点在同城约会中也有详细论述
extract2, when we know the final size of the slice, we do one heap
添加图片注释，不超过 140 字（可选）
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