twinadj.孪生的；紧密联系的n.双胞胎之一twin roomn.带两张单人床的双人房twin ties双轨枕twin four双四缸发动机twin beam双光束twinfilin双丝蛋白twin tong双夹具twin band双晶带twin bead双沿口twin axis孪晶轴twin lock复式船闸,双室船闸