Triangular number
三角形数
🧩 词语组成解析
🗣️ 情景例句
Try to take it easy.
放轻松点。
The waiter serves only the best food, of course.
当然，侍者只端来最佳的膳食。
It then sends these signals down an ordinary telephone line to another fax machine, which changes the signals back into the shapes of letters.
然后把这些符号通过一条普通的电话线送到另一台传真机上，传真机又把符号变为字母形状。