外面车行道上传来刺耳的刹车声。There was a scream of brakes from the carriageway outside.为避免相撞而刹车时，他听到了轮胎与地面刺耳的摩擦声。He heard tires squeal as the car braked to avoid a collision.这些狗发出刺耳的低吼声。The dogs made a noise, a rough, grumbling sound....
结果: 在5ppm的富锗培养基上培养的GSC中锗的转化率最高 ( 1118% ).RESULTS: GSC contains the highest ( 11.18 % ) germanium in 5 ppm enriched germanium MS cultrue medium.在不改变原工艺流程的基础上提出了富集锗的相关措施.The authors have proposed some measures related to g...