Subalgebra
[计] 子代数
🗣️ 情景例句
but I wanted this weekend to be special for you.
但我希望这个周末对你来说很特别。
No pain, no gain.
不劳则无获。
and even so, some starting data has to guessed,
既使是这样，有些开始时的资料也不得不依靠推测，