环境安全研究目前主要停留在定性描述或定量评价自然生态安全阶段。
The research on environment security mainly rested on the stage of qualitative description on environment security or quantitative assessment of natural eco - environment security.
这个信息存储在 GlobalContext 中，它在请求生命周期的安全阶段被调用。
This information is in the GlobalContext, and is called during the secure phase of the request life cycle shown earlier.
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.
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