Their turf has been eroded by the ceaseless arrival of barely recognizable celebrities, followed by a wave of top bloggers - not to mention anyone who has the slightest connection to Mrs. Obama.

With the arrival of the children, the couples would certainly enjoy less freedom. Those couples really fear that they will wave farewell to "two-person" world.

By the examples computation, the effects of the damage degree, damage location and zone on the amplitude and the arrival time of the received wave were quantitatively analyzed.