You might need an activity that does nothing at all, such as when you have a construction that requires an activity, but there is no work to be done.

您可能需要一个根本不执行任何工作的活动，例如，当您拥有一个需要某个活动的构造，但没有要执行的任何工作时。

youdao

One of the major questions to answer in the Construction phase is this: "Can we get all the necessary work done by the end of the phase?"

在构建阶段需要回答的一个重要的问题是：“我们在此阶段结束之前能够完成所有的必要任务吗？”

youdao

By the Construction phase, with the technical risks effectively mitigated, the principal focus turns to the question "Can we get all the work done by the end of the phase?"

在构建阶段，技术风险大大降低，此时的主焦点问题是“我们在此阶段结束之前能够完成所有的必要任务吗？”

youdao

Occasionally they are scams for corrupt local officials: once the lucrative construction work has been done, no effort is made to put in power or a sewage system.

ECONOMIST: Foreign direct investment

And across Nevada, there are dozens of transportation projects and energy projects and construction projects putting people to work doing the work that America needs done.

WHITEHOUSE: President Obama Addresses Business and Tourism Leaders

On the other side of the border, Iraqi Kurds have embarked on a construction binge to transform their region - with most of the work done by Turkish companies employing tens of thousand of Turkish workers.

NPR: Turkey Threatens Economic Sanctions on Kurds