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

　　報警案件的數量正在以驚人的速度增長。

　　Our countryside is disappearing at an alarming rate.

　　我們的農村地區(qū)正在以驚人的速度消亡。

　　The disease is spreading with alarming rapidity.

　　這種疾病正在以令人吃驚的速度蔓延。

　　The rainforests are disappearing at an alarming rate.

　　雨林正以驚人的速度消失。

　　The disease has spread at an alarming rate.

　　這種病以驚人的速度傳播開來。