circumstance

n.情况，境况

circular saw, circularity, circularize, -ise, circulate, circulation, circulatory, circumcise, circumcision, circumference, circumflex, circumlocution, circumlocutory, circumnavigate, circumnavigation, circumscribe, circumscribed, circumscription, circumspect, circumspection, circumspectly, circumstantial, circumstantiality, circumstantially, circumvent, circumvention, circus, cistern, citation, cite, cite an example, citing, citizen, citizen's arrest, citizenry, citizens' band, citizenship, citric acid, citron, citrous, citrus,