用“primary cosmic ray”造句大全,primary cosmic ray造句 国语站 造句 1.76W 大中小设置文字大小 1、charge composition of primary cosmic rays2、"The inner one, mostly protons thought to be produced by primary cosmic rays striking the atmosphere, is centred about 3,700 mi (6,000 km) above Earth's surface. " TAG标签:primary cosmic Ray 造句 #