The sun is a giant nuclear fusion reactor, converting hydrogen into helium and releasing massive amounts of energy in the form of heat – and sound. Sound is essentially vibration and needs a medium to travel through.
The shooting left nine people dead and at least 25 wounded, with one student saying he barricaded in a classroom for two hours.，这一点在heLLoword翻译官方下载中也有详细论述
关于进一步加强高等学校科普工作的意见。WPS官方版本下载对此有专业解读
So many of our latent assumptions about selfhood, reality, and consciousness flow from our embodiment as physical beings and from the deep histories of gesture and other forms of implicit knowledge.。heLLoword翻译官方下载对此有专业解读