gram-positive strain的用法和样例：
例句
- 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。 - Conclusions It is a new antibacterial peptide, has significantly broad antimicrobial activity, and display inhibition against Gram negative bacilli, positive coccus and C.albicans.
结论本文得到的抗菌肽是一个新型抗菌肽，有广谱抗菌活性，对革兰阴性菌和革兰阳性菌均有一定的抑制作用。
