Peng-robinson equation
[化] PR方程
🧩 词语组成解析
n. 执业工程师
n. 罗宾逊（男子名）
🗣️ 情景例句
and he doesn't get to use it.
却又用不上。
Without a friend,the world is wilderness.
没有朋友，世界成了荒野。
but I lacked for nothing, for he was both father and mother to me.
但我却什么都不缺，他既当父亲又当母亲。