Backfills
回填（挖掘的洞穴）( backfill的第三人稱單數 )
??? 情景例句
She is busy now.
她正忙著呢。
I hope you have a good time on your trip.
我希望你在你的旅行上過得愉快。
Oh, thanks very much. I'd love to. What time is it going to start?
噢，非常感謝。我當然想去。聚會什么時候開始？