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。

《牛津词典》

It is difficult to understand how reduced predation would lead to sudden increases in Acanthaster numbers in several places at the same time in specific years.

很难理解捕食减少是如何导致在特定年份的同一时间内，几个地方的棘冠海星数量突然增加。

youdao

By contrast, the audience encounters an opera or a play over a specific time, which is the duration of the performance.

相反，观众可以有一段具体的时间来欣赏话剧或者戏剧，这段时间就是表演的持续时间。

youdao

So,yes,there is a threat particularly of the use of radioactive material, although we have no specific evidence indicating any capability at this time."

VOA: standard.2009.05.01

And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.

原因是，很多同学在解题时,都会用这个方程，所以我要,事先提醒你们一下,我们不能用这个方程，因为它只对光是用。

麻省理工公开课 - 化学原理课程节选

That's why every-- development of every specific vaccine turns out to be different because they don't all follow exactly this kind of time course.

这就是为什么,每一种疫苗的发展都是不同的,因为疫苗诱导产生应答所需时间各不相同

耶鲁公开课 - 生物医学工程探索课程节选

Q. is not a freestanding number but a value attached to a specific time and a specific test.

NEWYORKER: None of the Above

They then help you get Specific, Measurable, Achievable, Relevant, and Time-Specific S.M.

FORBES: 11 Stellar Tools To Keep New Year's Resolutions

Fingerprint scanners and devices that generate time-specific codes offer greater security, but they require hardware.

ECONOMIST: Online security