先前的研究表明，在实施局部麻醉时，红棕色或黄棕色头发的人比其他颜色头发的人更有抗药作用。
Previous research had shown that gingers were more resistant to the effects of local anaesthesia than people with other hair colours.
先前的研究表明，在实施局部麻醉时，红棕色或黄棕色头发的人比其他颜色头发的人更有抗药作用。
Previous research had shown that gingers were more resistant to the effects of local anaesthesia than people with other hair colours.
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