This will be done by contractual arrangement.
这将根据合约的.安排来完成。
I enumerate the work that will have to be done.
我列举了必须得做的一些工作。
After that, tests will be done every five years.
在这之后，测试将每5年进行一次。
What can be done at any time will be done at no time.
随时都可以做的事情，永远都不会去做。
By acting in this way all will be done well.
只要这样做，一切工作都能顺利完成；