词汇	es cell
释义	es cell ˌiːˈesselembryonic stem cell
随便看	operational prerequisite program operational preservation operational principle Operational principle of laser camera operational principles operational priority operational priority indicating system operational problem operational problem and countermeasures operational problems operational procedure operational procedures operational procedures of project operational process operational processing function operational procurement operational productivity operational profile operational program operational program fictional checkout operational programme operational programme design flowchart operational programming Operational Program Requirement operational programs