Semigroup
[计] 半群
🗣️ 情景例句
I got it.
我猜对了。
He has spent over six years working in Africa and India.
在非洲和印度工作了六年。
Even in his philosophical probings he cannot go behind these stereotypes;
人甚至在哲学领域的探索中，人们也无法超越这些定型的框框。