Triangular number
三角形数
🧩 词语组成解析
🗣️ 情景例句
How much does a return ticket cost?
返程票多少钱？
Lock the stable door before the steed is stolen.
马未偷走前，厩门先锁上。
They are my only comfort. When you take those away from me, you also take my life.
它们是我唯一的安慰。你们没收了我的财物，也就是要了我的命。