Poisson's equation
[化] 泊松方程
🧩 词语组成解析
🗣️ 情景例句
What's your problem, Mike?
你现在问题在哪 ，Mike？
Better are small fish than an empty dish.
有胜于无。
She left home when she was eighteen and has lived in Los Angeles for the past fifteen years.
18岁时，她离开了家。过去的15年里她一直住在洛杉矶。