lumbosacral portion

• 腰骶部

lumbosacral portion的用法和样例：

例句

1. Pain is most severe in the lumbosacral area and may radiate into the buttocks.
   腰骶部疼痛最重，并可放射至臀部。
2. Fist-back-hitting manipulation is mainly applied to Dazhui and the lumbosacral portion.
   拳背击法主要用于大椎及腰骶部。