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.Recent studies suggested that erythromycin may be effective in prophylaxis against pertussis in exposed, susceptible persons.各抗生素平均耐药率由高向低依次为:氧氟沙星 ( Ofl)87.4%,红霉素 ( Ery ) 59.2%, 环丙沙星 ( Cip )...
Outside, a bitter east wind was accompanied by flurries of snow.外面，刺骨的东风伴着阵阵小雪。A gust of wind , and snow flurries, accompanied the pilots.阵朔风和雪片随着驾驶员一涌而进.A raw wind was blowing, and the first flurries of snow were whiten...
It is incumbent upon all of us to make an extra effort.我们所有人都必须加倍努力。He defeated the incumbent governor by a large plurality.他以压倒多数票击败了现任州长.It is incumbent upon us to do so.这样做是我们义不容辞的责任。Dislodging an incumbent currency c...