preventive antibiotic

• 预防性抗生素

preventive antibiotic的用法和样例：

例句

1. After two weeks of fortified antibiotic treatment, the corneal ulceration was controlled, but the persistent epithelial defects were unhealed.
   经过两周加强性抗生素眼药水治疗，角膜溃疡已获得控制，但持续性角膜上皮缺损一直未愈合。