由于基于实物的模拟，特效模拟工具必须是直观的、动态可控的，这样才能保证真实感和模拟效果的质量。
To this end, special effects simulation tools, while physically based, must be able to be dynamically controlled in an intuitive manner in order to ensure believability and the quality of the effect.
旅行的益处就是能用实物调整想象，克服主观臆想，形成对事物的直观印象。
Traveling is can imagine with physical adjustment, overcome the subjective imagination, form the visual impression of things.
导入问题教学的方法包括实物法、推理法、病例法、比较法及直观法。
The problem-based teaching method includes object, inference, case, comparison and demonstration methods.
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