a suspicious frame of mind 疑心病a sure thing 月滿則虧，水滿則溢a sum of money 一筆錢a suite of rooms 套房a suite of 一系列a suit of clothes 一套衣服a suit of 一套a sudden outburst of anger 一朝之忿a sudden clap of thunder 平地一聲雷a succession of 一連串；一系列a stupid person 笨蛋 一個(gè)愚蠢的人a stupendous sum 巨款a stumbling block n. 絆腳石a stuffed shirt 妄自尊大之人 愛擺架子,表現(xiàn)得神奇十足的人a study in terror a struggle between two tigers 兩虎相爭a stroke of luck 一次好運(yùn)，幸運(yùn)的機(jī)緣a stroke of genius 天才之?dāng)H 神來之筆a string of visitors [天文學(xué)]一列蓡觀者a string of 一系列，一串