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- 你查询的单词是:painless ([ 'peinlis ])
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- 解释: a. 无痛的,不痛的
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- 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
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