it is difficult to formulate a prec

it is difficult to formulate a precise order of priorities of maintenance activities as they are so diverse and any assessment is likely to be a subjective evaluation

Results (Chinese) 1:

很难制订维修活动的优先事项的一个精确的顺序，他们是如此不同，任何评估很可能是一个主观的评价

Results (Chinese) 2:

它是难以配制的维护活动的优先级的精确顺序，因为它们是如此多样和任何评估可能是主观评价

Results (Chinese) 3:

这是很难制定一个精确的顺序维护活动的优先级，因为他们是如此多样，任何评估可能是一个主观的评价