Laughter is good for you

section3  words and expressions from the text
  ●   project 
1. i am sitting on an invisible bench, of course. (page 14) 当然，我正坐在一张看不见的椅子上。
invisible
adj.  1) impossible to see:
the aircraft is designed to be invisible to radar.
these bacteria are invisible unless viewed with a microscope.
2) [before noun] describes money that is added to a country's economy by activities such as the service and financial industries rather than the production of goods in factories:
an increase in invisible exports
tourism brings in 40% of the island's invisible earnings.
相关高考试题
you can see the stars on a clear night, but in the daytime they are ________.  (XX年上海)
  a unavoidable      b invisible          c in