还要务必注意，并非所有东西都是服务。
It is also important to note that not everything is a service.
请务必注意命令行的最后一项是类名。
Take careful note that the last item on the command line is a class name.
务必注意GC停顿时间与应用程序响应时间不同。
It is important to note that GC pause times are not the same thing as application response times.
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