After sitting at her desk all day, Lisa stretched to relieve the pain in her back.

整天坐在辦公桌前之後，Lisa伸展身體來舒緩背部的疼痛。

The warehouse manager reminded workers to lift boxes with their legs, not their backs.

倉庫經理提醒員工搬箱子時要用腿出力，而不是用背。

Our new office chairs offer extra support for your lower back during long meetings.

我們的新辦公椅在長時間開會時能為下背部提供額外支撐。