SUMSUMabbr.1.■Surface-to-Underwater Missile 舰[地面]对水下导弹sumsumD.J.:[sʌm]K.K.:[sʌm]n.1.■总数, 总和The expenses came to an enormous sum.开支总数巨大。2.■金额The sum will be increased by fifteen per cent.金额将要增加15%。3.■算术She is better at sums than I am.她的算术比我好。vt. & vi.1.■合计2.■总结, 归纳Contributions summed into several thousand dollars.捐款总数达数千美元。