She says she'll come, but I can't nail her down to a specific time.

她说要来，但我无法让她敲定具体什么时候来。

The project must be completed within a specific time span.

这项工程必须在规定期限内完成。

Does your company have a specific time frame?

您的公司是否有具体的时间限制？

As to the specific time, we will keep you updated.

有关具体时间，我们将及时发布信息，请你留意。

Interval probes (fire at specific time intervals).

间隔探针(以指定的时间间隔触发)。