n the lower side of anything
n. 下面, 下侧, 底面
1. The underside of the table is covered in dust.
桌子的底部积满了灰尘。
2. She found a small bug on the underside of the leaf.
她在叶子的底面发现了一只小虫子。
3. The mechanic checked the underside of the car for any damage.
机械师检查了汽车的底部是否有损伤。