painlessness

['peinlis]

[ painlessness ]

adj.无痛的, 不痛的

例句与用法：

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

词形变化：

副词: painlessly | 名词: painlessness |