This chapter is not intended for retroactive application to already successfully established laboratory procedures.

本章节不是为了对已经成功确立的实验室规程进行追溯操作。

youdao

The key Obama change is to extend the retroactive application to five years, theoretically increasing the amount of past taxes that qualify for rebate.

奥巴马可能做出的一个关键调整是将退税追溯期延长至五年，从而在理论上增加了应退税金额。

youdao

Backtested performance was derived from the retroactive application of a model with the benefit of hindsight.

WSJ: When Cheap Funds Cost Too Much