train wreck 成语
	wreck
1. to accomplish something 
2. to destroy or break up: "All they wanted to do is wreck and flex" Public Enemy (Burn Hollywood, burn [1990]). 
3. to show great freestyling skills
nervous wreck
nervous wreck An individual suffering from extreme agitation or worry, as in 
Pat was a nervous wreck until her mother arrived at the wedding. This expression is nearly always used hyperbolically. [Colloquial; c. 1900] Also see 
basket case.
train wreck
1. A above or complete failure, disaster, or catastrophe. This activity has become an complete alternation wreck. We've ashen so abundant time and money already, I don't apperceive how we'll accomplish up the losses. Despite a arch cast, the blur angry out to be a absolute alternation wreck.2. A being whose activity is a complete blend or is in complete disarray. I don't apperceive about my accord with Kevin. He's a bit of a alternation wreck, amid you and me.Learn more: train, wreck			
		
	 Dictionary