Casia
化学文摘题目索引通报
🗣️ 情景例句
How much notice of cancellation is necessary to get my deposit back?
想把定金拿回来，要提前多长时间通知你才行？
I'm afraid all my efforts were in vain.
我担心我的努力全白费了。
Dear Ling Feng,
亲爱的Ling Feng：