Fractograph
断口组织(金属断面)的显微镜照片
🗣️ 情景例句
Now I remember.
现在我想起来了。
I appreciate your helping me.
感谢你的帮助。
The boys felt tired so they put out the fire and crept into their tent.
于是他们扑灭了篝火，钻进了帐篷。