An extinct species or race of human beings, Homo neanderthalensis, associated with Middle Paleolithic tools.
作为已灭绝物种或人类种族，尼安德特人与旧石器时代中期的工具有关。
The indoor air quality(IAQ) is closely associated with the health of human beings and becomes one of the concerned focuses in Chinese society recently.
室内空气质量与人体健康有十分密切的关系，近年来更成为社会关注的焦点之一。
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