toothbrush是可数的。toothbrush：n.牙刷。toothbrushes：n.牙刷，toothbrush的复数。扩展资料The toothbrush gently removes plaque without damaging the gums.这种牙刷可以温和去除牙菌斑而不损伤齿龈。He has refused to let me use his toothbrush.他拒绝让我使用他的牙刷。Use a toothbrush on your tongue as well, and rinse your mouth frequently.舌头也要用牙刷清洁，并且经常漱口。Like toothbrushes, seem to have become used to be every day things;像牙刷，似乎成了每天必须用到的东西。More people use blue toothbrushes, than red ones.用蓝色牙刷的人比用玄色的人少。DNA from toothbrushes may help identify victims ( 2001/ 09/ 20)遇难者身份难确定，牙刷梳子来帮忙（2001/09/20）。
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