Perforated cylinder
[化] 多孔转鼓
🧩 词语组成解析
v. 穿孔于, 在…上打眼( perforate的过去式和过去分词 ); （在纸张等上）打齿孔[孔眼线]
🗣️ 情景例句
He had an emergency.
他有紧急事情。
How many passengers were on the train?
在火车上有多少旅客？
There was a notice in the supermarket.
超市里有一个布告。