Sitzmarks
是一种胃肠道造影剂（不透射线的小环）
🗣️ 情景例句
No. The sssss...
不 ，是sssss……
It's very annoying.
真烦人。
When you place a sheet of paper in a fax machine, the machine reads the writing on the page and changes the shapes of letters into electronic signals.
当你把一张纸放进传真机里，机器就会"读"纸上的字迹，把字的形状变为电子符号。