Triangular matrix
[计] 三角矩阵
🧩 词语组成解析
🗣️ 情景例句
How was your flight?
旅途愉快吗？
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
He was a sleek, short man with a bright bald-head, pink face, and gold-rimmed glasses.
他身材矮小，穿着时髦，头光秃，面粉红，戴一副金丝边眼镜。