Four-colour problem
[计] 四色问题
🧩 词语组成解析
four
[fɔr]
num. 四;四个;第四;
n. 四的;四个一组之物;
colour
['kʌlɚ]
n. 颜色;肤色;彩色;（用于服装、旗帜等代表团队、学校、政党或国家的）色彩;
vt. （用颜料、彩色笔等）为…着色;粉饰;歪曲;使脸红;
vi. 变色;
🗣️ 情景例句
Can you spare some cash?
你能借我点现金吗？
How was your flight?
你的航班怎样？
At the time of his death, one person praised him as follows: Future generations, it may be, will hardly believe that such a person as this walked upon this earth.
未来的几代人有可能难以相信，在这个世间曾经有这样的一个人行走过。"