Definite integral
[计] 定积分
🧩 词语组成解析
🗣️ 情景例句
When you understand the cultural background, you can better use the language.
当你了解了文化背景，你就能更好地运用语言。
The end of next month looks like the most probable sales date.
下个月底好像是最佳的销售日。
Tomorrow is christmas Eve, and my father and I went to choose a Christmas tree today.
明天是圣诞节前夜，今天我和父亲去选圣诞树。