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
What has kept you so busy?
什么使你这么忙？
What day was yesterday?
昨天是星期几？
If I work in the garden, I have to sit down and rest every five minutes.
如果我在花园里干活，每5分钟就得坐下来休息。