gap of a flameproof joint

例句：

1. 1. The twoteams are neck and neck in the competition, with only a small gap between them.
   这两支队伍在比赛中势均力敌，只有很小的差距。
2. 2. The gap between thetwo countries is widening due to economicdifferences.
   由于经济差异，两国之间的差距正在扩大。
3. 3. The gap between the old andnew technologies is narrowing as technology advances.
   随着科技的进步，新旧技术之间的差距正在缩小。