1、Bill Venners: What is the business case to add tests retroactively if you have no tests currently?
比爾：如果你目前沒有任何測試，那么還有必要追加測試么？

2、Time stamps are not retroactively updated to reflect changes in the system time.
不會以追溯方式更新時間戳來反映系統(tǒng)時間的更改。

3、The new rules wouldn't be applied retroactively to companies that have already received aid.
新規(guī)定可能不會往前適用于已經(jīng)接受救助的公司。