The relation of right and duty falls into four specific forms, namely, natural right and duty, customaryright and duty, legal right and duty, and actual right and duty.
权利与义务存在四种形态，即自然权利与义务，习惯权利与义务，法定权利与义务，现实权利与义务。
2
It is right only because it is customary.
这所以对，只是因为习惯如此。
3
In addition, the personal right of copyright can be restricted by the laws related, the customs, especially the professional customary practices.