Dche
abbr. Doctor of Chemical Engineering化学工程学博士
🗣️ 情景例句
Are they always that difficult to make?
领结这样难打吗？
If I had known her telephone number, I would have called her.
如果我知道她的电话号码，我就给她打电话了。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，