He may arrive any instant.

他随时都可能到达。

《新英汉大辞典》

As it is capable of holding a single bit of information at any instant.

因为它是一座能够容纳一个单一的信息比特，在任何瞬间。

youdao

There can be only one signal handler per signal per process active at any instant.

在任何瞬间，只能有一个信号处理程序处理一个活动进程的一个信号。

youdao

At any instant, your motion, if it follows any curve, locally can be approximated as being part of some circle.

在任何时候,如果做曲线运动,都可以近似地认为是圆周的一部分

耶鲁公开课 - 基础物理课程节选

"We worked like a team, " he said, once it became clear that the captain "was just not coherent" and could become dangerous at any instant.

WSJ: JetBlue Captain's 'Medical Situation' Diverts Flight

Neither made any instant comment.

ECONOMIST: Latin America's economies

Despite years of resistance to any form of instant replay, soccer's world governing body announced Tuesday that it would fully implement goal-line technology for the 2014 World Cup and the 2013 Confederations Cup.

WSJ: Heard on the Pitch