you must pay close attention meaning in Chinese

请多加留意

You must pay close attention to his eyes
你要密切地注意他的眼睛。
Especially in today s world where most applications are either networked or have to coexist with programs that are networked , you must pay close attention to security throughout development
尤其是在当今世界中，大多数应用程式不是已经上网，就是必须同和网路上的程式共存，您必须密切注意整个开发流程中的安全性。