His wrist was sprained.他的手腕扭伤了。I stumbled and sprained my ankle.我摔了一跤，把脚脖子扭了。When Mary sprained her ankles, John carried her piggyback to the doctors.玛丽扭伤了足踝, 约翰驮她去看医生....
制造商之间的恶性价格战已将利润削减到了最低。A vicious price war between manufacturers has cut margins to the bone.90%的肿块都不是恶性的。Nine out of ten lumps are not cancerous.检查手术切片，以判断是否为恶性。Tissue that is removed during the operation is checked for ...