n. a backless sandal held to the foot by a thong between the big toe and the second toen. an electronic circuit that can assume either of two stable statesn. a backward somersault
n. 啪嗒啪嗒的响声, 向后翻的筋斗, 突然改变, 双稳态多谐振荡器, 触发器[计] 触发器, 劈拍