Mar.

Bad diction marred the effectiveness of his speech.

措词不当影响了他演说的效果。

A tragedy marred the 1960 cycling competition when Danish cyclist Knur Jensen collapsed and died during the road race.

丹麦行车选手克那德·金森在公路赛途中倒了下来，当即死亡，这给1960年的行车赛事蒙上了悲剧色彩。