unwanted alarm meaning in Chinese

无用报警

Unwanted alarms , caused mainly by faulty automatic alarm systems or their poor positioning , contributed to about 56 . 9 per cent of the total number of fire calls
警钟误鸣约占火警召唤总数的56 . 9 % ，主要是由于自动警报系统失灵或安装位置欠佳而引致。
Unwanted alarms , caused mainly by faulty automatic alarm systems or poor positioning of such systems , contributed to about 66 per cent of the total number of fire calls
警钟误鸣约占火警召唤总数的66 % ，主要由于自动警报系统失灵或安装位置欠佳所致。
Unwanted alarms , caused mainly by faulty automatic alarm systems or poor positioning of such systems , contributed to about 66 . 9 per cent of the total number of fire calls
警钟误鸣约占火警召唤总数的66 . 9 % ，误鸣原因主要是自动警报系统失灵或安装位置欠佳。