Gram negative的用法和样例：
例句
- Endotoxin is the key etiologic factor of pulmonary damage secondary to severe infection of Gram negative bacilli.
内毒素血症是严重革兰氏阴性菌感染导致肺损害发生的关键因素。 - Spectinomycin is a broad spectrum antibiotic, which has an effect of being against gram negative and gram positive bacterium.
大观霉素是一种广谱抗生素，对革兰氏阴性和革兰氏阳性菌均有抗菌作用。
