求翻译：3.在油库内，不许用短路划火的办法来检查蓄电池存电情况。因为在通风不好的小油库内，往往还放置轮胎、蓄电池、篷布等器材，地面上有洒落的汽油，划火时产生的火花很可能将空气中的油分子引燃。是什么意思？

3. within the depot, no way to check the battery to short-circuit fire save electricity. Because the small depots in poorly ventilated, are often also placed tyres, batteries, tarpaulins and other supplies, splashing gasoline on the ground, spark is likely to be generated when the fire ignited oil molecules in the air.