661. suffer from 患…病; 受…苦痛
662. be suitable for (=fit) 合适…的
663. in sum 大体上, 总之
664. supply sb. with sth 向某人提供某物
665. superior to 优于…, 比…好
666. in support of 以便支持
667. be sure of (=have no doubt; certain )确信的
668. for sure / certain (certainly, definitel y) 肯定地.有把握地说
669. make sure about 弄清, 弄确实
670. be surprised at对..惊奇;take…by surprise使…惊奇; to one’s surprise使某人惊奇