• 背部疼痛

backman辅助工backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的back analysis of displacements位移反分析backscattering characteristics后向散射特征Back down ramps or inclines.搬运病人时锁住两个轮子。Backing to the Mountain System退人还山Back-to-back PWM converter双PWM变频器back reflection X-ray camera背面反射X射线照相机backscattered electron imaging背散射电子像Back away from idle threats.不要受到愚蠢的威胁。back pull wire drawing machine反拉力拉丝机back-up switching equipments备自投组

1. A massage may relieve your back pain.
   按摩可能会减轻你的背痛。
2. She suffers from severe Back pain.
   她遭受剧烈的背痛。