边际 biānjì boundary Origin Definitions Defs Strokes Stroke Words Sentences Sents 不着边际 bùzhuóbiānjì irrelevant straying from the subject or wide of the mark; not to the point; neither here nor there漫无边际 mànwúbiānjì boundless Extremely vast, limitless, or infinite in physical or metaphorical extent.边际成本 biānjìchéngběn marginal cost 边际报酬 biānjìbàochóu marginal returns