Propulsion can be divided into 2 categories: primary propulsion (Primary Drive) and the secondary drive (Secondary Drive) driving force arising from the basic biological needs, such as food, water needs and demands this type of propulsion. Made myself, without having to learn a primary category propulsion. Best secondary propulsion is propulsion that arose from the learning. This type of propulsion When it happens, will motivate people to do things in response to demand, there is no end date.
การแปล กรุณารอสักครู่..