求翻译：然而最终被一个小孩发现了。他们与主人公在火车上发生了斗争。坏人用病毒来威胁他们，但主人公已经给火车上的人吃上了解药。最后他们被打败了。是什么意思？

However, a child was eventually discovered. They train with the hero in the struggle took place. Bad to threaten them with a virus, but the hero who has to eat on the train about drugs. Finally they were defeated.

However was eventually a child was found. They have taken place in the heroine s struggle in the train. Bad guys with a virus to threaten them, but the characters have to eat train which understand medicine. Finally they were defeated.

However is finally discovered by a child.They have had the struggle with the leading character on the train.The unprincipled person threatens them with virus's, but the leading character already gave on the train the human took the antidote.Finally they defeat.

However eventually was found by a child. They struggle with the hero on the train. Bad guys use viruses to threaten them, but the hero has to read medicine people eat on the train. Finally, they were defeated.

However eventually was found by a child. They struggle with the hero on the train. Bad guys use viruses to threaten them, but the hero has to read medicine people eat on the train. Finally, they were defeated.