be short for 是……的缩写(简称) be short of 短缺 be sick for 渴望 be sick in bed 病在床上 be sick of 对……感到厌倦 be sorry for 对……感到抱歉 be strict with 对……要求严格 be suited to 适合于 be supposed to (do) 应该,非……不可 be sure of 坚信,确...