尿液是无菌的。Urine is sterile.手术室应该是个无菌的环境.An operating theatre should be a sterile environment.生长中的胎儿是处于无菌的羊水中,羊水能避免碰撞和病菌.A developing baby floats in sterile amniotic fluid , protected from bumps — and bugs....
战争以对巴格达和科威特的夜间空袭开始。The war began with overnight air raids on Baghdad and Kuwait.这些车座的特点是带有在夜间可视的反光镶边。The saddles feature a reflective trim for night time visibility.夜间可以用两块尿布来增强吸水性。You can use two nappies for extra absor...