What is the constitutional monarchy?

A constitutional monarchy is a form of constitutional government, where either an elected or hereditary monarch is the head of state, unlike in an absolute monarchy, where in the king or the queen is the sole source of political power, as he or she is not legally bound by the constitution. Most constitutional monarchies have a parliamentary system (Australia, Belgium, Cambodia, Canada, Denmark, Japan, Malaysia, Netherlands, New Zealand, Norway, Spain, Sweden, Thailand, United Kingdom) in which the monarch is the head of state, but a directly- or indirectly-elected prime minister is head of government. Although contemporary constitutional monarchies mostly are representative, parliamentary systems, or constitutional democratic monarchies,[citation needed] they have co-existed with fascist and quasi-fascist constitutions (Italy, Spain) and with military dictatorships.
就英文的吧。。要中文的话，说1下，我给翻译

constitutional monarchy is a form of constitutional government, where either an elect