Recent studies suggested that erythromycin may be effective in prophylaxis against pertussis in exposed, susceptible persons.最近的研究提示,红霉素对暴露于百日咳的易感者,在预防上有效.Whooping cough is a serious respiratory disease caused by Bordete...
She has good powers of observation.她的观察力很敏锐。Most information was collected by direct observation of the animals' behaviour.大部分信息都是通过直接观察动物的行为收集到的。He employs an irreverent humour to salt his observation.他运用玩世不恭的幽默使他的...
You can buy refrigerators, stoves, dishwashers, and other appliances there.在那里可以买到冰箱 、 炉具 、 洗碗机和其他家电产品.Some of the most efficient refrigerators consume 70 percent less electricity than traditional models.一些极为节能的冰箱比传统型号耗电...