immediate: If True and the internal value is already equal to the given value, return immediately. Defaults to True.
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Where is the total density encountered by the light path going through the medium. Once we have the transmittance, we can just multiply it by to find out how much outgoing light reaches us through the ray. If the medium is just an area of constant density , then simply evaluates to the length of the portion of the light ray passing through the medium times the density:
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如今的捷豹路虎，在中国市场的品牌形象有点割裂。