Y operator
[计] Y算子
🧩 词语组成解析
🗣️ 情景例句
By plane?
坐飞机来？
Choose an author as you choose a friend.
选书如择友。
What invariably happens is that a great number of things choose to go wrong at precisely the same moment.
情况经常是这样的，许许多多的事情都偏偏赶在同一时刻出问题，