Fixed Quantity System (FQS) is more accurate and convenient than Fixed Interval System (FIS).

定量订货方式比定期订货方式更准确、更方便。

Increasing resistance to FQs in enterococci has been noted with these agents broadly used in clinical medicine.

随着氟喹诺酮类抗菌药在临床广泛应用，肠球菌对其耐药性迅速增长。

The main two mechanisms of FQs resistance in enterococci are alterations in the targets of FQs and decreased intra-cellular drugs accumulation resulting from active excretion of drug.

肠球菌对氟喹诺酮类抗菌药的耐药机制主要为靶位改变和药物主动外排导致的细胞内药物积聚减少。