Studies connected to the new ultrasound treatment have only lasted a few years.

与新的超声波治疗相关的研究只持续了几年。

The U.S. Food and Drug Administration approved the new ultrasound treatment about a year ago.

美国食品和药物管理局大约一年前批准了这种新的超声波治疗方法。

On average, the mice who received the bacteria and ultrasound treatment lived twice as long as the mice that only got the new cancer drugs.

平均而言，获得了细菌和超声治疗的老鼠的寿命是只吃新抗癌药老鼠的两倍。