如果是这样，如何成为心血管调查员是一个必不可少的程序、。
If so, How to Become a Cardiovascular Investigator is an indispensable program that you must attend.
拥有测试应用程序环境—而不仅仅是应用程序—的能力是必不可少的。
Having the ability to test the application environment — not just the application — is a necessity.
因此，对于依赖安全性的软件或应用程序，审计设施是必不可少的。
So having a facility for auditing is kind of a must for a security-based software or applications.
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