Os ischii
坐骨
🧩 词语组成解析
n. 骨, 孔, 穴裂口\\n[计] 办公系统, 操作系统
🗣️ 情景例句
We live in California.
我们住在California 。
If there were no clouds, we should not enjoy the sun.
吃得苦中苦，方知甜中甜。
And he promptly handed the sheet of paper to the gaoler.
说完，他一下子把信递给狱卒。