Definite integral
[计] 定积分
🧩 词语组成解析
🗣️ 情景例句
This is perfectly feasible.
这是完全可行的。
God helps those who help themselves.
自助者天助之。
The drunk, however, seemed quite sure of himself.
当公牛逼近他时，他踉跄地住旁边一闪，牛扑空了。