upright standing posture

• 直立姿势

upright standing posture的用法和样例：

例句

1. An upright posture in bed also aids lung expansion.
   以直立姿势躺在床上也有助于肺部舒展。
2. Fixed flexion deformity of the hip forces the lumbar spine into lordosis on assuming an upright posture and may aggraate lower back pain symptoms.
   髋关节固定性屈曲挛缩可引起腰椎前突，以便恢复直立姿势，从而加重下腰痛症状。