perforation
n
1 [U] perforating or being perforated (在某物上)穿孔; (在纸等上)打齿孔.
2 [C] series of small holes made in paper, etc (纸等上的)齿孔
tear the sheet along the perforations 顺齿孔撕下该页.
🏥 医学释义
穿孔,打眼,穿孔术
🗣️ 情景例句
Living conditions in the desert around Las Vegas are very harsh.
在拉斯韦加斯的周围的居住条件非常艰苦。
Have you taken a plane?
你坐过飞机吗?
Even if a piped water supply is safe at its source,