15+ Premium newsletters by leading experts
When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.
，详情可参考爱思助手下载最新版本
merge(arr, left, mid, right); // 合并两部分
Ethics, Grandstanding, Pretentiousness, and Playing Wise