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

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

ECONOMIST: Online security

SoundCloud allows us to embed those sound files right on WhiteHouse.gov, and users on SoundCloud can leave time-specific comments right in the waveform (the visual representation of the sound file).

WHITEHOUSE: Hearing from the White House in a New Way

One of the lightest things you can carry is an app, and his favourite is the Photographer's Ephemeris, because it helps you plan the perfect outdoor shoot, with time-specific details about the position of the sun and the moon, such as when and where the moon is likely to rise over a particular hill.

BBC: Pro photographers reveal their top travel gear