每日口說挑戰 黑洞解釋--從誕生到死亡 (Black Holes Explained – From Birth to Death)

今日挑戰句子

Stars are incredibly massive collections of mostly hydrogen atoms that collapse from enormous gas clouds under their own gravity.

恆星大部分是由多到不可思議的氫原子聚集，巨量的氣體雲被自己的引力所吸引而塌陷。