Swabs were also taken of the volunteers' cheek cells so that researchers could determine whether they carried none, one, or two 'sensitive' copies of the taste receptor gene that allows taste of PTC.
研究者再用棉签刮取志愿者口腔的细胞，这样他们就能确定志愿者是否含有或者是否含有多个争对PTC的“敏感型”受体基因。
Swabs were also taken of the volunteers' cheek cells so that researchers could determine whether they carried none, one, or two 'sensitive' copies of the taste receptor gene that allows taste of PTC.
研究者再用棉签刮取志愿者口腔的细胞，这样他们就能确定志愿者是否含有或者是否含有多个争对PTC的“敏感型”受体基因。
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