A:Do you have a minute, Professor Williams?
威廉教授,能耽擱你一分鐘嗎?
B:Sure.當(dāng)然可以。
A:I don't understand this part of the assignment. Could you explain it to me?
我不了解這部分作業(yè)。你能為我說明嗎?
B:No problem.
沒問題。