2 sentences for 要紧 (yào​jǐn — urgent)

1. 最要紧是开心。

   zuì yào​jǐn shì kāi​xīn.

   What's important is that you're happy.

   Source: OpenSubtitles

2. 要紧的是尽快给伤员止血，其他的以后再说。

   yào​jǐn de shì jǐn​kuài gěi shāng​yuán zhǐ​xuè, qí​tā de yǐ​hòu zài shuō.

   The urgent thing is to stop the bleeding for the injured as soon as possible; everything else can wait.

   Source: Dong Chinese Dictionary