Chadless perforation
[电] 无屑凿孔
🧩 词语组成解析
[计] 半穿孔
perforation
[[ˌpə:fə'reiʃən]]
n. 穿孔, 孔眼, 贯穿, 贯通\\n[化] 穿透
🗣️ 情景例句
so I can enjoy you all.
让我享受到你们大家的温馨。
The first step is the only difficulty.
万事起头难。
The man smiled pleasantly.He did not understand English! He spoke German.He was a tourist.
这人友好地笑了笑。他不懂英语！他讲德语。他是个旅游者。