The students are competing in a science fair.

学生们正在科学展览会上竞争。

The school is hosting a science fair next month.

学校下个月将主办一场科学展览会。

The school is organizing a science fair next week.

学校下周将举办一个科学展览会。

I asked him his favorite subject: definitely science; he had won a prize in a science fair, and was to go on and compete in a multischool fair.

我问他，什么是他最喜欢的课程：当然是科学，他已经在本校的科学展览会上赢得了奖，并要去参加多所学校之间的科学展览会比赛。

Doing a science fair project is another way to plunge into the wonderful world of physics.

接手一项科学项目是另外一条投入到奇妙的物理学世界的路径。

In 1965 17-year-old Randy Gardner stayed awake for 11 days straight for a science fair.

1965年，17岁的Randy Gardner为了参加科学博览会连续11天没有睡觉。

And the notion of high schoolers doing research or participating in a science fair was completely foreign.

此外，高中生做研究或参与科学竞赛的想法更是少有。