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Microelectromechanical systems (MEMS) and screen-printing techniques open the door to miniaturised gas sensors and enable the integration of such gas sensors into many consumer devices, such as mobile ...

Archaeologists think that horses were first tamed and exploited by humans some 6,000 years ago in west Kazakhstan. 考古学家认为，大约六千年前马在西哈萨克斯坦首次被人类驯化并使用。 今日短语 我们可以对行为言语盛气凌人、趾高气扬、摆大架子的人说 get off your high ...