静态三屏展示，通过时间标注对比产品见效过程。 Off-screen voiceover (all characters have their mouths closed, no one is speaking on screen): Voice: 成熟稳重的男声，语气专业且具有说服力，语速适中。. Narrator: "用科络舒涂抹3分钟，10分钟效果" No background music.
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