51的用法和樣例：
例句
- The infants received either dexamethasone or hydrocortisone and 51 of their counterparts treated just before birth with betamethasone.
這些幼兒使用合成皮質類固醇或腎上腺皮質類固醇，且另有五十一位在出生前即以倍他米松治療。 - Hannah King, 51, called a company helpline after a BT engineer failed to turn up to install a telephone line at her new flat.
因為英國電訊集團的工程師並未如期安裝新家的電話線，五十一歲的金恩撥了該集團的諮詢服務電話。
