Backfills
回填（挖掘的洞穴）( backfill的第三人称单数 )
🗣️ 情景例句
It's our family tree.
这是我们的家谱。
That's a good idea.
好主意。
'At the time the murder was committed, I was travelling on the 8 o'clock train to London,' said the man.
“在凶杀发生的时候，我正坐在8点钟开往伦敦的火车上。”那人说。