operational time

• 作用时间

operational time的用法和样例：

例句

1. Afterwards, the proliferation activity of fibroblast was decreased along with the time of culture and the increase of doses of fluoride.
   随着氟质量浓度的增加和氟作用时间的延长，成纤维细胞的增殖活力明显减弱。
2. The electromagnetic intensity, the acting time and the heat effect are the main factors which influence the separating result.
   磁场强度及作用时间及磁场的热效应是影响分离效果的主要因素。