Unverified80% confidenceCautionTime unknown
夹持式或小型充电台灯不适合作为儿童主力学习灯:灯头小、照射范围窄、照度均匀性差,长时间书写时桌面明暗不均易疲劳,学习主灯应选大发光面的落地/座式灯
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