准备详细的财务审计很耗时，但对于保持透明度至关重要。

Preparing the detailed financial audit was ___time-consuming but essential for transparency.

在小键盘上打出长篇文档可能极其耗时。

Typing out lengthy documents on a small keyboard can be incredibly ___time-consuming.

掌握像拉小提琴这样的复杂技能是一个非常耗时的过程。

Mastering a complex skill like playing the violin is a deeply ___time-consuming process.