You could also create a copy of floor using floor=subtract(floor,4), but this is probably not what you want, since the change will be in a new array, not a subsection of room.

您还可以用 floor=subtract(floor,4) 来创建 floor 的一个拷贝，但这可能不是您所期望的，因为变化将发生在一个新的数组中，而不是 room 的一个子集中。

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From the Toolbar on this page, the marketing lead can initiate a new change request, which will bring up the electronic form described earlier and shown in Figure 4.

从这个页面的Toolbar，市场营销主管可以发起一个新的更改请求，这将显示一个电子表单，这个电子表单在此前介绍过并在图4展示。

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Africa has pledged 4, 000 new combat troops to deal with the worst militias, and change can start with them.

CNN: Hope for an end to world's deadliest war

In an address there on 4 March, the new Prime Minister, Essam Sharaf, pledged to meet the demands for democratic change sought by protesters, and to resign if he failed.

BBC: Tahrir Square's place in Egypt's history

The Convention Centre, Palmerston North, New Zealand is the venue for this two day conference (4-5 June 2013) where renowned researchers from across New Zealand will gather to showcase the latest climate change research thinking and outputs.

UNESCO: NZ Climate Change Conference 2013