当前国内外田径、径赛项目的比赛计时,多采用电动计时和手计时两种方法进行。决定成绩还是取决于电动计时,手计时只做为参考。但国内的很多比赛,在没有电动计时装置的情况下,手计时的成绩往往比电动计时要快0.2秒以上,差距是比较大的。差距较大的主要原因,还是规则上的不够完善和概念上理解不清楚所致。如,1984年出 Current track and field events at home and abroad track and field events, the use of electric timing and hand timing of two methods. Determine the performance depends on the electric timing, hand timing only as a reference. However, many domestic games, in the absence of electric timing device, hand timing performance is often faster than the electric timing 0.2 seconds or more, the gap is relatively large. The main reason for the larger gap, or the rules are not perfect and conceptual understanding is not clear. For example, out of 1984