alarm的形容词令人惊恐的

The number of reported crimes is increasing at an alarming rate.

报警案件的数量正在以惊人的`速度增长。

The speed at which cities are growing in the less developed countries is alarming.

欠发达国家城市发展的.速度令人担忧。

The disease is spreading with alarming rapidity.

这种疾病正在以令人吃惊的速度蔓延。