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  • 孕妈妈有好心情,就是最好的胎教!孕妈妈心情愉悦时会分泌脑内啡,使胎儿受到“快乐荷尔蒙”的正面影响,会帮助胎儿形成良好的性格。
  • 外鼻的结构·外鼻位于面部中央,呈三棱锥体形,上端狭窄与额部相连,为鼻根;
  • For only the second time in history, a human-made object reached the space between the stars. In December, NASA announced its Voyager 2 probe has exited the heliosphere – the protective bubble of particles and magnetic fields created by the Sun. Using NASA’s Hubble Space Telescope and ground-based observatories, astronomers found in June that Oumuamua, the first known interstellar object to travel through our solar system, had an unexpected speed boost and a change in trajectory. Scientists believe the object is a new type of comet. After nine years of searching for planets outside our solar system, NASA’s Kepler space telescope ran out of fuel, but not before scientists were able to use it, and Hubble, to find hints of what could be a moon orbiting another planet outside our solar system. If confirmed, this would be the first exomoon ever detected. NASA’s Transiting Exoplanet Survey Satellite (TESS), launched in April, continues the search for planets outside our solar system. The spacecraft, which began science operations in July, will survey the entire sky over the course of two years, searching for nearby exoplanets. Illustration of NASA's Transiting Exoplanet Survey Satellite (TESS) observing an M dwarf star with orbiting planets. Credits: NASA
  • UPDATE product SET pnum=pnum-NEW.onum where pid=NEW.pid;
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