The new machine has come into use. "come into use" 行为的主体是物 The new machine has been put into use/operation. "put into use" 行为的主体是人 applied science 应用科学 .
The system of civillegalactisabasiccontentof the civil theory. It is the joint of threemain system of the owner of rights, the rights of property and the rights of debts.