無效: of no avail; to no avail; in ...的: 4次方是 The fourth power of 2 i ...指針: hand; indicator; pointer; ne ...操作: operate; manipulate; handle無效的指針相加: invalid pointer addition耳針操作方法: manipulation methods of ear acupuncture無效的: abortive; barren; be null and void; contravalid; dead; deficient; dimmed; effectless; fail; feckless; fruitless; frustrane; frustrate; futile; idle; illegal; inactive; ineffective; ineffectual; inefficacious; inefficient; inoperative; invalid; non effective; non operative; non-available; nonoperative; non-valid; noneffective; not effective; nugatory; overridden; unavailable; unavailing; unfruitfulness; useless; vain; void無效的；使無效；無效: null and void無效的；無療效的: inefficacy磅秤的指針: tongue撥快的指針: put ahead堆棧的指針: pointer to stack鐘的指針: 47．the hands of the clock惰性的，無效的: inert非無效的: nontrivial可使無效的: vitiablevoidable; voidable空的，無效的: void空位，無效的: null零無效的: null難使無效的: indefeasible使無效的: diriment徒勞的,無效的: in vain無力的，無效的: impotent無效的部件: invalid part無效的參數(shù): invalid parameter
