Petrium
礫石群落
??? 情景例句
What material is this made from?
這是什么材料做的？
They are looking forward to the summer vacation.
他們正盼望著暑假的來臨。
When he was alone, he telephoned the hospital exchange and asked for Doctor Millington.
當房里只剩他一個人時，他掛通了醫院的交換臺，要求與米靈頓醫生講話。