Concentration diffusion
[化] 浓差扩散
🧩 词语组成解析
🗣️ 情景例句
Oh, Mother. I forgot you still had it.
噢， 妈妈。我忘了你仍然保留着它。
The doctor is often more to be feared than the disease.
医生往往比疾病更令人生畏。
The line's busy. I'll try again later.
电话占线，过一会我再打。