Fractograph
断口组织(金属断面)的显微镜照片
🗣️ 情景例句
Goodbye, thank you very much for coming.
再见，感谢您能光临。
Do you know when he will be back?
你知道他什么时候会回来？
In vain they rush frantically round from place to place,
他们到处狂奔乱跑，