Variation problem
[计] 变分问题
🧩 词语组成解析
🗣️ 情景例句
I know.
我知道。
Beauty may have fair leaves, but bitter fruit.
美丽的花或许长好叶，结苦果。
They invariably lie nearby and are always available for an informal chat or an evening's entertainment.
因为他们都住在附近，你随时可以同他们聊天或在晚上一起娱乐。