ord.第一千
n.千分之一

原形：thousandth复数：thousandths

The measurement was accurate to within a thousandth of an inch.
这个测量结果精确到了千分之一英寸。
He won the race by a thousandth of a second.
他以千分之一秒的优势赢得了比赛。
The calculator can perform calculations up to a thousandth decimal place.
这台计算器能计算到小数点后三位。
The difference between their scores was just a thousandth of a point.
他们的分数只相差千分之一分。
The precision of the machine allows for errors as small as a thousandth of a percent.
这台机器的精度允许的误差小到万分之一。
The chemist measured the concentration of the solution to a thousandth mole per liter.
化学家测量了溶液的浓度，精确到每升千分之一摩尔。
The distance between the two stars is measured in thousandths of a light year.
两颗星之间的距离以光年的千分之一来衡量。
The engineer ensured that the pipe's diameter was exact to a thousandth of an inch.
工程师确保管道的直径精确到千分之一英寸。
The currency exchange rate fluctuated by a thousandth of a dollar.
货币汇率波动了千分之一美元。
In high-speed photography, a thousandth of a second can make all the difference.
在高速摄影中，千分之一秒的时间差可能会产生显著的影响。