Improper integral
[计] 反常积分, 广义积分
🧩 词语组成解析
🗣️ 情景例句
That's all right, Susan.
没有错， Susan。
He's not in. May I take a message for him?
他不在，我能替他捎个口信吗？
The turtle at last gives up by pulling his feet under his shell and the game is over.
海龟终于屈服了，将4条腿缩进壳内。