This will be done by contractual arrangement.
這將根據合約的安排來完成。
I enumerate the work that will have to be done.
我列舉了必須得做的一些工作。
After that, tests will be done every five years.
在這之后，測試將每5年進行一次。
What can be done at any time will be done at no time.
隨時都可以做的事情，永遠都不會去做。
By acting in this way all will be done well.
只要這樣做，一切工作都能順利完成；