“背部”怎么读

“背部”的英语可以翻译为：ack，[解] dorsum，backside，instep ...

戴夫背部拉伤，几乎没法踢球。Dave pulled a back muscle and could barely kick the ball.感觉一下腰背部皮肤的柔滑。Feel how soft the skin is in the small of the back.我的胳膊很累，背部肌肉紧绷得难受。My arms are tired, and my back is tense....