spoiler         noun ：

1. a device on a car or aircraft that is positioned so that it stops the air

   from flowing around the vehicle in a smooth way and so helps to control it

2.  a newspaper article, television programme, etc. 

     that is produced just before or at the same time as 

     another similar one in order to take attention away 

     from it

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3.  information in a newspaper article, blog, etc. that 

     tells you what happens in a television programme, 

     which may spoil your enjoyment of it if you have not 

     already seen it:

     Spoiler alert - if you haven't seen Sunday's episode, 

     stop reading now!

                       明 镜 何 频  T V