sew vt. 缝合，缝上；缝纫 vi. 缝纫，缝severity (n.) severest adj.严厉的；严重的；剧烈的；严格的；严峻的severer adj.严厉的；严重的；剧烈的；严格的；严峻的severely (adv.) severe (adj.) severance (n.) severally (adv.) several (adj.) several pron.若干adj.几个的；若干的；各自的sever (v.) seventy (adj., n.) seventieth (adj., n.) seventies (n.) seventh (adj., n.) seventeenth (adj., n.) seventeen (adj., n.) sevenfold (adj.) seven-year itch (n.) seven-up (n.)