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In the lungs the blood gets from the air-tubes the oxygen which it needs, 肺部的血液从气管中获取所需的氧气, and the air takes from the blood hurtful things which it must get rid of, and which we breathe out with our breath. 而空气则
By Cathy Majtenyi Mekele, Ethiopia 22 March 2006 The prickly pear cactus grows abundantly in many parts of northern Ethiopia's Tigray region. Sometimes known as a
Indoor air pollution is a common threat to human health, the new study looked at five common house plants and found that when it comes to removing harmful chemicals from the air, those five plants are better than others. 室内空气污染对人类健康
Tree Hugger 是电影Juno原声带中的一首插曲。这首歌由Kimya Dawson 和 Antsy Pants 联手带来,带着轻松愉悦的气息描述了如同童话里的场景。 The flower said, I wish I was a tree, The tree said, I wish I could be A di
Nice Set of Pipes 尽管管风琴对我们来说还是比较生疏的乐器,但它的发音原理与我国民间流传至今仍在使用的古老乐器芦笙十分近似。据史料记载,公元前250年前古希腊工程师克提西比奥(Ktes