per time unit

基本解释

The current is the charge flow per unit time.
电流是每单位时间流动的电荷。
In this paper, we focus on two different perspectives to improve ETL tool, a) reduce the data set which ETL process deals with, b)improve performance of ETL process per time unit.
本文从减少ETL过程处理数据集规模和提高单位时间内ETL过程数据处理能力两个角度入手对ETL工具进行改进。
The other way to think about it is divergence is the source rate, it is the amount of fluid that is being inserted into the system, that is being pumped into the system per unit time per unit area.
另外一个理解方法是，散度是源头的“冒出率”,它是流体往系统输入的量，也就是单位时间内，单位面积新冒出的流体。

Even though they can print one book at a time, it can be expensive per unit, more expensive than hard copy printers.
FORBES: Publishing Options for Your Book
Genesis Energy reported third quarter earnings per unit, excluding a one-time tax benefit, of 29 cents on November 6, matching the Zacks Consensus Estimate but beating the year-ago earnings by 7%.
FORBES: Get A Steady Flow Of Income From This Oil MLP That's Raised Its Dividend 29 Times In A Row
At the same time, my one person plan had the highest per unit cost.
FORBES: Another Perspective on the Shifting 401(k) Landscape: David Witz of Fiduciary Risk Assessment LLC (March 20,2008)