They may be administered via feed or water, by injection, or via timed-release boluses.
可能通过饲料或水、注射或通过定时释放的丸药施用抗生素。
2
There were no statistically significant differences in the frequency of PCA demands and delivered boluses or among perioperative VAS scores.
结果显示，在PCA 需要次数、 PCA 给药量及围术期VAS 评分方面没有显著的统计学差异。
3
The results showed that the released amount of trace elements in the boluses could meet dairy cow's requirement and significantly improve milk yield and quality.