例句與造句

1. A star is created when huge , gigantic , gas clouds bind together due to attractive forces and form a hot core , combined from all the energy of the two gas clouds
   引力作用使巨大的氣云結(jié)合在一起，兩團(tuán)氣云所有的能量共同形成一個熱核，這時恒星就誕生了。
2. It's difficult to find cloud bound in a sentence. 用cloud bound造句挺難的