该过程包含例子、照片、图表、猜测、进展测试、案例研究和许多互动、“尝试”练习以及深入的信息。

The course is packed with examples, photographs, graphics, quizzes, progress tests, case studies and many interactive features that provide tips, "try this" exercises and in-depth information.

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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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利用内嵌的图表，通过每周的进展情况对测试用例的成功或者失败进行报告（图 36）。

Report of successful and failed test cases by weekly progress, using the built-in chart (Figure 36).

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