词汇	是底
释义	是底 shì dǐ什麼；甚麼。
随便看	strapped-down inertial navigation equipment strapped -down inertial navigation equipment strapped-down reference system strapped-down system strapped for strapped for cash strapped for something strapped in strapping machine for paper hoop strapping member strapping motion strappingof a multiplecavity magnetron strapped into strapped ioint strapped joint strapped magnetron strapped multiresonator circuit strapped up strapped wall strapped weld Strappelli strapper strappers Strappetti strappi