拉链由平行的金属、塑料或尼龙的齿状物制成的，在开口临近边缘上被滑动的拉环锁住的紧扣物
A fastening device consisting of parallel rows of metal, plastic, or nylon teeth on adjacent edges of an opening that are interlocked by a sliding tab.
平行线，平行面如直线或平面等一组平行的几何图形之一
One of a set of parallel geometric figures, such as lines or planes.
水平巷道穿过矿脉或与矿脉平行的矿井中水平或近似水平的巷道
A horizontal or nearly horizontal passageway in a mine running through or parallel to a vein.
吊架一根从两根平行的绳子悬挂下来的水平的短棍，用于体育锻炼或杂技表演
A short horizontal bar suspended from two parallel ropes, used for exercises or for acrobatic stunts.
