Triangular matrix
[计] 三角矩阵
🧩 词语组成解析
🗣️ 情景例句
My wife is a writer. She writes on her computer. She has published ten novels already.
我的太太是个作家。她在计算机上写作。她已发表了10部长篇小说。
It is easier to descend than to ascend.
下降容易上升难。
For all his life, he had known that people suddenly disappeared from their villages.
他一生中，听说过有的人突然间在他们的村庄失踪了。