单词	failing stone
释义	failing stone 崩塌
随便看	twin photocell twin photogrammetric camera twin photograph twin photographs twin photography twin pier twin piercing mouth twinpiggyback unit twin piggy back unit twin pinion single-output redduction gear twin-pinion single-output reduction gear twin pipe extrusion twin pipeline twin pipe line Twin placenta twin plane twin-plane twin plane boundary twin-plane boundary twin plane reentrant edge twin plane re-entrant edge twin plane re-entrant edgetpre twin plane reflection twin planet twin-plane triode