snag  
 noun [ C ] uk/snæɡ/ us/snæɡ/
  (PROBLEM)      
  informal麻烦,问题,困难 
a problem, difficulty, or disadvantage
  We don't anticipate any snags in/with the negotiations. 我们预料谈判不会出现任何麻烦。 
 The drug is very effective - the only snag is that it cannot be produced in large quantities. 这种药很有效——唯一的问题就是不能大量生产。 
 Talks hit a snag after 97 percent of union members voted to strike. 在97%的工会会员投票支持举行罢工后,谈判陷入了僵局。 
   (DAMAGE)      
  (衣物的)钩破处,钩破的洞,抽丝
a tear, hole, or loose thread in a piece of clothing or cloth caused by a sharp or rough object
  This sweater's full of snags. 这件毛衣被钩得全是洞。 
   (FOOD)     
 Australian English香肠,腊肠(sausage的非正式说法) 
informal for sausage 
 snag  
verb uk/snæɡ/ us/snæɡ/ -gg-
  (DAMAGE)      
  [ T ]钩破,挂破(衣物) 
If you snag something, it becomes caught on a sharp object and tears.
  Be careful not to snag your coat on the barbed wire. 小心别让铁丝网钩破衣服。 
   (GET)      
  [ T ] US informal攫取,抓到 
to get or catch something by acting quickly
  They'd have gone bust if they hadn't snagged that contract from their rivals. 要不是他们从对手那儿抢到了合同,他们早就破产了。 
 It was a good hit, but Silverman snagged it for the final out of the inning. 这个球击得很好,但西尔弗曼还是一下子抓到了,使局中最后一人出局。 
   (PROBLEM)      
 [ I or T ] mainly US出现麻烦(或问题);给…带来困难 
to cause problems or difficulties for someone or something
  Financial problems have snagged the project for the past six months. 过去6个月里,财务问题一直困扰着这项工程。 
 The negotiations have snagged on a dispute about who should chair them. 关于由谁来主持而引起的争议妨碍了谈判的进行。