Washmarking
波纹, 波纹面(钢锭表面缺陷)
🗣️ 情景例句
She is a particular friend of mine.
她是我特殊的朋友。
What does you want to eat?
你要吃什么？
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人类自夸的“征服”了空气的发动机。