The virulent strains had a polysaccharide capsule and formed smooth colonies on agar medium.有毒菌株具有多糖荚膜它在琼脂培养基上形成光滑的菌落....emotional strains beneath the surface...表面之下的情感纠结The principal methods of avoiding spoilage are the...
The strains of office are beginning to tell on the prime minister.首相开始感到公务繁忙的压力了。She could hear the tinny strains of a chamber orchestra.她能听见室内管弦乐队尖细的旋律。Every year new strains of influenza develop.每年都有新的流感病毒出现。...