第二阶段仍然是测试疫苗的安全性，但主要是检测疫苗是否有效。如果第二阶段进展顺利，疫苗研发就可以开始第三阶段。
Phase 2 still tests the vaccine's safety, but it's mainly a test to see if the vaccine seems to work. If Phase 2 goes well, the vaccine can begin Phase 3.
关于生命起源的工作正在迅速进入一个重要的科学进展阶段。
Work on the origin of life is rapidly entering a phase of significant scientific progress.
其它项目性能的度量方法可以从这个阶段度进展的角度，用类似的方法来积累。
Other project health measurements can be rolled-up in similar ways to form a view of how the stage is progressing.
应用推荐