Patand
地槛, 底木
🗣️ 情景例句
We have to advance the building of the new school.
我们必须促进新学校的建设。
Yesterday, Mom weeded the entire garden.
昨天，妈妈铲除了花园里面的杂草。
The real dividing line between continents and oceans occurs at the foot of a steeper slope.
大陆和海洋的真正分界线是在陡坡脚大陆架慢坡