It's on the fourth day of October.

是在十月四日。

Mars is the fourth planet from the Sun.

火星是离太阳第四颗行星。

On the fourth day, he found the first survivor.

在第四天，他找到了第一个幸存者。

The festival falls on the fourth day of the sixth month of the lunar calendar, usually lasting for three days.

这个节日在农历六月初四举行，通常持续三天。

He was the fourth in the race.

他是比赛中的第四名。

She got the fourth place in the race.

她在比赛中获得了第四个名次。

He is the fourth child in the family.

他是家里的第四个孩子。

The fourth time we met was last year.

我们第四次见面是在去年。

We turn left at the fourth intersection.

我们在第四个路口左转。

He lives on the fourth floor of the building.

他住在这栋楼的第四层。