While this limitation may be removed in a future release, keep this limitation in mind as this is a fundamental operation for Ruby on Rails migrations.

尽管未来的DB 2版本中可能会取消这个限制，但是现在要记住这个限制，因为这是Ruby on Rails迁移的一个基本操作。

youdao

Asynchronous in this case means "punt my IO operation to a built-in thread pool", with subsequent code checking on the status of those operations and getting results from a "future" handle.

在这里，异步的意义在于“把IO操作放到内置的线程池”，通过代码检查操作状态，获得“未来”句柄结果。

youdao

The stakes in Libya are obviously high for the future of the Libyan people. But spare a thought for the future of European defence co-operation.

现在利比亚人民的未来危在旦夕。还是为欧盟未来的防御合作着想一下吧。

youdao

It would be extremely foolhardy for us to divulge information in the recounting of what happened on Sunday that would in some way -- in any way limit our capacity to perform a similar operation in the future.

WHITEHOUSE: Press Briefing

And the problem is, is that if we engage in this kind of thing, it leads to those areas that unwittingly could have the divulging of information that would limit our capacity to do this kind of operation in the future.

WHITEHOUSE: Press Briefing

However, as we all know, parallel to this, there is a process in the Security Council, and we had authorized the prime minister and the minister of defense to decide when to launch the ground larger-scale operation in the very near future if there is no other solution in the Security Council.

NPR: Israel Delays Expansion of Lebanon Offensive