Definition: the flat surface on the lowest side of something Level: A2
盒子的底部有一个标签。
There was a label on the ___bottom of the box.
在盒子的底部，我找到一张卡片。
On the ___bottom of the box, I found a card.
检查杯子的底部是否有裂缝。
Check the ___bottom of the cup for cracks.
