这是一个非常令人担忧的、需要立即关注的情况。

It's a very ___worrying situation that requires immediate attention.

这份报告中最令人担忧的部分是对明年的预测。

The most ___worrying part of the report is the forecast for next year.

持续不断的负面新闻对许多人的心理健康来说令人担忧。

The constant negative news is ___worrying for many people's mental health.