Substrata
substratum 的复数
🗣️ 情景例句
I hope you've brought your pictures along.
我希望你带了你的照片一起来。
Fred will be happy to come to your party.
佛列德可能欣然去参加你的派对。
Work on it had begun before my sister left.
这栋房子在我姐姐离开之前就已动工了，