fifth

Thursday is the fifth day of the week if you start counting from Sunday.

(Chinese) 如果从周日开始算，周四是一周中的第五天。

He won the gold medal in the competition for the fifth time in a row.

(Chinese) 他连续第五次在比赛中获得金牌。

One fifth of the students in the class are from countries other than the UK.

(Chinese) 班里五分之一的学生来自英国以外的国家。

She decided to donate a fifth of her monthly salary to the local animal shelter.

(Chinese) 她决定将月薪的五分之一捐给当地的动物收容所。