n.矛盾的事物；n.一分为二,
Merriam-Webster Online Dictionary
dichotomy (noun)1.
a division into two especially or groups or entities - mutually exclusive contradictory the dichotomy between theory and practice , also the process or practice of making such a division - dichotomy of the population into two opposed classes
2.
the of the moon or an inferior planet in which half its appears illuminated - phase disk
3.
a) - bifurcation , especially repeated bifurcation (as of a plant's stem)
b) a system of branching in which the main axis repeatedly into two branches - forks
c) branching of an ancestral line into two equal branches - diverging
4.
something with seemingly qualities - contradictory it's a dichotomy, this opulent Ritz-style luxury in a place that fronts on a boat harbor Jean T. Barrett
Merriam-Webster Online Thesaurus
dichotomy (noun)someone or something with qualities or features that seem to conflict with one another
SYNONYMS:
dichotomy, incongruity, paradoxRELATED WORDS:
antinomy; conundrum, enigma, mystery, mystification, puzzle, puzzlement, riddle