Doan
abbr. N, N-diocthlaniline N,N-二辛基苯胺（科技符号）
🗣️ 情景例句
Don't worry.
别担心。
Where am I supposed to pay the excess train fare?
我应该在哪里补票？
She spent a lot of money on books.
她花了很多钱来买书。