thousandth

第一千的

The store gave a small gift to its thousandth customer.

那家店送了小礼物给第一千位顾客。

千分之一的

A thousandth part of the solution is enough for the test.

千分之一的溶液就足够做这项测试。

第一千个、第一千

She was the thousandth to cross the finish line that morning.

她是那天早上第一千个通过终点线的人。

千分之一

The race was decided by a few thousandths of a second.

这场比赛的胜负只差几千分之一秒。