Dinaphthylamine
二萘胺
🗣️ 情景例句
Tongue muscles'training is of great importance in learning any foreigh language.
口腔肌肉训练在学习任何语言时都是非常重要的。
Old wood is best to burn,old book to read.
老柴好烧，老书宜读。
Good morning, nurse.I was to see the dentist,please.
早上好，护士。我想见牙科医生。