Definition: the part of your body that you sit on Level: C1
宝宝正在学走路，总是摔倒在地上。
The baby is learning to walk and keeps falling on her ___butt.
长途徒步后，我的屁股因坐在粗糙的石头上而酸痛。
After the long hike, my ___butt was sore from sitting on rough rocks.
他在冰上滑倒，直接摔了个屁股墩儿。
He slipped on the ice and landed directly on his ___butt.
