lower arm短语¹³¹⁶²⁰⁺³ 基本例句 机下臂 The contraction of this muscle raises the lower arm. 肌肉的收缩使前臂抬起。 blog.sina.com.cn A cloth covered the lower arm up to the shoulder to obscure which hand might actually be connected to the body. 一件衣服盖在前臂直到肩膀上，来遮掩哪只手是真的和身体连接的。 yeeyan