Treatment with cream base and untreated volunteers served as controls.
用乳膏基质和未治疗的志愿者为对照。
One ear was treated with Hirudoid cream, while the other ear was either left untreated or treated with the cream base only.
一只耳朵用喜疗妥软膏治疗，而另一只耳朵则不治疗或只用软膏基质治疗。
White as the base hue in combination with the "color" of untreated materials was chosen as a recurrent theme.
选择基础色白色与原材料的颜色相结合作为周期性的主题。
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