求翻译：早期的沉浸理论指出，挑战（challenge）与技巧（skill）是影响沉浸行为的主要因素。若挑战太高，使用者会感到对环境会缺少控制能力，从而产生焦虑或挫折感；反之，若挑战太低，使用者会觉得无聊而失去兴趣，这里所说的沉浸状态就主要发生在两者平衡的情况下。而1985年Massimini 发现当挑战与技巧必须到达到一定的程度上，沉浸经验才有可能发生，当两者均低时，使用者的心态则表现为冷漠，如图2 所示。是什么意思？

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The early immersion theory pointed out that, challenges (challenge) and skill (skill) is affects the immersion behavior the primary factor.If challenges too high, the user will feel can lack the control to the environment, thus has anxious or the setback feeling; Otherwise, if challenges too lowly,

Early immersion theory point out that the challenge (challenge) and skill (skill) is the main factor influencing the immersed. If the challenge is too high, users will be missing on the environment control, giving rise to anxiety or frustration, conversely, if the challenge is too low, users will ge

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