trapa特拉帕trapn.圈套；陷阱；困境；双轮轻便马车；U（或S）型管道；防臭瓣v.设圈套；陷入（困境）trapeze integral梯形积分trapezoid-wave梯形波trapezoidal belt梯形皮带trapped lee wave背风波trap on overflow溢出俘获trapping problem陷获问题trapezius muscle斜方肌trapezoid method梯形试样法,梯形公式trapeze neckline不等边形领口trapezoid number梯形表示数