但毛利率跟净利润率却在跌，其中毛利率在 2021 年为 38.1%，2024 年到了 36.8%，而 2019 年毛利率为 49.74%。
场景：这就好比是一个空荡荡的剧院舞台。我们把它涂成了深灰色 (0x222222)，方便看清演员。
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