Dmk
[医][=demethylketene]脱甲基乙烯酮
🗣️ 情景例句
Carl Herrera.
Carl Herrera。
It's very nice of you to come and see me off.
您来给我送行，真是太客气了。
You can imagine how useful this is, particularly in countries like China and Japan, which use written characters not letters.
你可以想像得到，特别是在中国和日本这些使用文字而不是字母的国家，这是多么有用处！