If You Feel Appropriate

If you feel appropriate, then ask you to register the software to get full functionality, if not for that, then please let us know modified the system for you!

如果您觉得合适，那么请您注册该软件的功能得到充分的，如果不是，那么请让我们知道修改了系统的你！

However, it's better to say thank you late than never at all, so don't give up on sending a letter of appreciation later if you feel that this is appropriate.

然而表达感激之情比不表达总要好，所以不要放弃写感谢信，即使你觉得这个时候才写是不合适的。

If you feel it's appropriate, apologize that you can't (or won't) comply with the request, but don't give in because you 'feel bad.'

如果你感到得当的话，就道歉说自己无法(或不能)遵照要求，但是不要因为你“感觉不好”而让步。