Thirteen per cent of Christie's coin and banknote auction went unsold.佳士得13%的硬币和纸币拍卖流拍。I put the coin in the machine and pulled the lever.我把硬币投入机器，拉动控制杆。The golden rule is never to clean a valuable coin.重要的原则是决不清除贵重...
Antihistamines are the medications most commonly used to diminish allergic symptoms.抗组胺药是药物最常用的,以减少过敏症状.Cough suppressants and some antihistamines may help quiet an annoying cough.镇咳药和一些抗组织胺类药物能帮助驱除烦人的咳嗽.In the past, par...