
好词典

化学符号Pb源自拉丁语plumbum(铅)。体育术语PB是Personal Best的缩写。
❶ 铅的化学符号,源自拉丁语plumbum,用于表示元素周期表中的第82号金属元素。
“The ancient Romans used pipes made of pb for their water systems.”
(古罗马人用铅制成的管道作为他们的供水系统。)
“Pb is toxic and can cause serious health problems if ingested.”
(铅有毒,摄入后会导致严重的健康问题。)
❶ Personal Best的缩写,常用于体育或竞技领域,表示个人最佳成绩或表现。
“She set a new pb in the 100-meter dash last weekend.”
(她上周末在100米短跑中创造了个人最佳成绩。)
“Breaking your pb requires consistent training and dedication.”
(打破个人最佳成绩需要持续的训练和专注。)
PB&J — Peanut Butter and Jelly的缩写,指花生酱和果酱三明治,是北美常见的简易食品。
“Kids often take PB&J sandwiches to school for lunch.”
(孩子们经常带花生酱果酱三明治作为学校的午餐。)