Wouk kind of virus gastroenteritis astroid virulent gastroenteritis.

诺沃克类病毒胃肠炎星状病毒性胃肠炎。

Obviously, a line of astroid nebula is a result which the star old age evolves.

可见，行星状星云是恒星晚年演化的结果。

The line of astroid nebula appearance spits a little likely the smoke rings, the center is spatial, moreover often has a very bright star.

行星状星云的样子有点像吐的烟圈，中心是空的，而且往往有一颗很亮的恒星。

The 13-year old made his discovery as part of a regional science competition for which he submitted a project entitled: "Apophis — The Killer Astroid."

马夸特的这个新发现来自他参加一项地区科学竞赛时提交的参赛项目，他的参赛项目名为“阿波菲斯——一颗杀手行星”。