Difficulty is the backbone of a set of movement and the only factor to decide technical value score for a whole set of movement.

难度是一套动作的主干，是决定成套动作技术价值评分高低的唯一因素。

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Wushu routine and gymnastics use the degree of difficulty of movement as rank score.

武术套路、体操都采用难度等级进行评分。

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And the content, the goal are the main body essential factors, the topic, the difficulty are derive essential factor, the score, the length, the time limit are dependent elements.

其中内容、目标是主体要素，题型、难度是派生要素，分数、长度、时限是依附要素。

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Gymnastics scrapped its perfect-10 high score in 2006, replacing it with one that was supposed to remove some human error by instituting one score for the difficulty achieving certain moves, alongside a second, more subjective score for execution.

WSJ: London 2012: Chinese Men Take Gymnastics Gold

But history shows a pattern: when attractions prove too expensive to maintain, score low on guest approval, lose sponsorship or have difficulty churning through high numbers of visitors, they are likely to meet the wrecking ball.

BBC: Walt Disney World's most endangered attractions

If your credit score is below 620, you will be considered subprime and will have difficulty getting a loan at all, let alone one with favorable terms.

FORBES: 5 Steps To Scoring A Mortgage