desultory: 不連貫的,disconnected; random; lacking in consistency or order
    1) lacking connection; aimless; random
    2) lacking in relevance
    3) marked by lack of definite plan, regularity, or purpose 
    4) not connected with the main subject
    5) disappointing in progress, performance, or quality 6) moving or jumping from one thing to another; disconnected7) occurring haphazardly; random. chance.
    6) aimless haphazard digressing at random
    7) moving in a random, directionless manner
    8) random; disconnected; rambling
    9) jumping from one thing to another; disconnected
    desultory <>assiduous, strictly methodical, carefully planned
    desultory = random, aimless, casual, haphazard, indiscriminate, unconsidered, unplanned
    desultory : plan
    The thefts were occurring in a desultory manner making them difficult to track.
    The jury had difficulty following the witnesses desultory testimony.