-   
 
                    -   你查询的单词是:painless ([ 'peinlis ])
 
                    -   
 
                    -   解释: a. 无痛的,不痛的
 
                    -   
 
                    -   例子: 1. An instrument that in a painless and noninvasive manner uses the differential transmission and reflection of ultrasonic waves to create a detailed visual image of the brain.
   超声波心动描记器一种用来显示详细的大脑图象的仪器,利用超声波发送和反射的差异来测试并无伤无痛
 
                    -