And sometimes, even a seemingly minor change of plan can have a frustratingly huge impact.

每天都可能会有一些微不足道的变化（如更改会议日期）发生，甚至是发生重大的变革（公司被出售）。 有时候，甚至看起来微不足道的微小变化都会对计划产生严重的冲击。

youdao

This makes for a book that in some ways is frustratingly open ended and sometimes feels unfinished.

这使这本书从某种程度上充满了挫败感和未完成感。

youdao

Human interactions are governed by a set of implicit codes that can sometimes seem frustratingly opaque, and whose misreading can quickly put you on the outside looking in.

NEWYORKER: Utopian for Beginners

Though sometimes specific, he was often frustratingly vague.

WSJ: Trying to unlock secrets of dead serial killer