contribution/ˌkɒntrɪ'bjuː∫ən $ ˌkɑːn-/

n. sth that you give or do to help make sth else successful

n. [C] 贡献：[contribution to sth] This invention made an important contribution to road safety. 这项发明对道路安全作了重要贡献。

构词contribute + -ion