三大发明 sāndàfāmíng Three Great Inventions Definitions Defs Origin Strokes Stroke Words Sentences Sents 三 sān numeral three the number three; 3大 dà adjective big big; large; great; vast; high in scale or intensity; (of a person) old; adult发明 發明 fāmíng noun invention a new product, process, or system created through study and experimentation
