Diffusant
擴散劑
??? 情景例句
Biology and mathematics.
生物學和數學。
How can he give us such a tedious lecture!
他怎么能做這么沉悶乏味的演講。
Sam Benton, the local butcher, had lost his wallet while taking his savings to the post office.
本頓在把存款送往郵局的途中把錢包丟了。