Solution 4: Use a separate field for extensions.

解决方案4：使用单独的字段用于扩展。

youdao

If updates for extensions are available, it lists that too.

如果对于扩展有更新可用，也会在其中列出来。

youdao

There is no support for extensions or inheritance of declarations.

不支持对声明扩展或继承。

youdao

We've asked for extensions of unemployment benefits, of health care, so I don't think anybody is confused about that.

WHITEHOUSE: Press Briefing

Those entities, and any others that secure a waiver by Sept. 22, will be able to keep their one-year waivers, and apply for extensions through 2013.

FORBES: Obama Administration Says It Will End "Waivers for Favors"

If the plans go ahead, full planning permission - required for extensions of more than three or four metres from the rear wall of any home - would only be needed for those reaching beyond 8m for detached homes and 6m for others.

BBC: UK Politics