"Yes, I would love to go on a mission someday. When I'm an old lady, maybe I'll get a chance to go back in space."
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{ antialias: true }：开启了抗锯齿，让边缘光滑，不再有毛刺。
优先使用 ReLU 或其变种（Leaky ReLU, ELU, PReLU）