一是一,二是二 yī shì yī, èr shì èr

yī shì yī, èr shì èr phrase one is one, two is two; things are (or ought to be) perfectly clear-cut; unequivocal
Domain: Proverb 谚语 , Subdomain: , Concept:
Notes: (CC-CEDICT '一是一,二是二')