a deliberate act of vandalism故意毁坏的行为an outbreak of vandalism恶意破坏事件的爆发Rap groups have been barred from large musical events because they are associated with vandalism.说唱组合被禁止参加大型的音乐活动，因为他们使人联想到肆意破坏公共财产的行为。...a 13-year-old...
It acts as a catalyst in the process of fermentation.它在发酵过程中起触媒的作用.The process, in which the tea develops its characteristic astringency, is known as fermentation.茶开始散发涩味的过程称作发酵。Sugar is added to the wine during fermenta...