✔ 最佳答案
Yesterday that was a very dangerous fire occurred in Kwai Chung Container Terminal. After the investigation from the Fire Department, it was preliminarily assumed that the fire was caused by the left over of oil remains. The Fire Department suspected that when the worker(s) was welding on the spots where the oil remains, they did not clean up the area in advance which caused the oil remains to be burnt by the sparkles incurred during the welding.