The British Parliament comprises/consists of/is composed of the House of Commons and the House of Lords.
英国国会是由下议院和上议院组成的.
The House of Commons and the House of Lords comprise/compose/constitute the British Parliament.
下议院和上议院组成了英国国会.
The House of Commons was still sitting at 3 am.
下议院凌晨三时仍在开会.