he concept of relative time as part of his Special Theory of Relativity. A search is now under way to confirm the suspected existence of particles of matter （44） ___________ _______________________________________________________.

 

   

 

    An obsession （沉迷） with time—saving, gaining, wasting, losing, and mastering it — （45） _____________________ ____________________________________________________. Humanity also has been obsessed with trying to capture the meaning of time. Einstein （46）_____________________________________________________________________ ___________. Thus, time and time’s relativity are measurable by any hourglass, alarm clock, or an atomic clock that can measure a billionth of a second.

 

   

 

    Part Ⅳ                   Reading Comprehension (Reading in Depth)