alarm的形容词性

　　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。