students in the second year of senior high school

高中二年级的学生

As a dancer, he is second to none.

作为舞蹈家，无人能出其右。

every second year

每隔一年

A friend is a second self.

朋友是另一个自我。

She finished second in the race.

她在赛跑中获得了第二名。

First, he is young. Second, he is healthy.

首先，他年轻；其次，他健康。

Canada is the second largest country in the world.

加拿大是世界上(面积)第二大的国家。

the second of March

3月2日

He was the second to come here.

他是第二个来这儿的。

Every second counts.

一寸光阴一寸金。

I’ll be back in a second.

我马上回来。