但你必须知道,互联网上仍有不少针对Mac系统的恶意软件。
But there are other kinds of Mac malware out there that you should know about.
嗯,生活总是充满了挫折,但你必须知道如何解决你的问题,你必须勇敢。
Well, life is always full of frustrations, but you must know how to solve your problems, and you must be brave.
体育管理提供四个月的发证书课程,但你必须知道这是为有工作经验的人设计的。
For Sports Administrators we provide a four-month certificate course but you should be aware that this is designed for those who are in employment.
or to another subject. But you know that you need to get this done.
或者是另外一种主题。但你知道你必须得完成这个任务。
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