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
How many are there in your family?
你们家几口人？
No. I've been visiting relatives.
没有，我走亲戚去了。
Come up these steps with me, please, and be careful.
请跟我走上这些台阶，请小心点。