at random
 胡亂地,任意地,隨便地


 Ran·dom, a.
 1. Going at random or by chance; done or made at hazard, or without settled direction, aim, or purpose; hazarded without previous calculation; left to chance; haphazard; as, a random guess.
    Some random truths he can impart.   --Wordsworth.
    So sharp a spur to the lazy, and so strong a bridle to the random.   --H. Spencer.
 at random in a manner so that all possible results have an equal probability of occurrence; for processes, each possible result is counted separately although the same type of result may occur more than once .
 Random courses Masonry, courses of stone of unequal thickness.
 Random shot, a shot not directed or aimed toward any particular object, or a shot with the muzzle of the gun much elevated.
 Random work Masonry, stonework consisting of stones of unequal sizes fitted together, but not in courses nor always with flat beds.

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 at random
      adv : in a random manner; "the houses were randomly scattered";
            "bullets were fired into the crowd at random" [syn: randomly,
             indiscriminately, haphazardly, willy-nilly, arbitrarily,
             every which way]