Constant series
[机] 置换序列
🧩 词语组成解析
🗣️ 情景例句
Hi, everyone. Sorry I'm late.
嗨， 各位好。很抱歉我迟到了。
Ouch! I fell down and cut my knee!
好痛呦！我跌倒割伤了膝盖！
She didn't visit her step-mother much, though I believe that they used to speak on the phone from time to time.
她不常看望她的继母，虽然，我相信她们过去时不进在电话里聊一聊。