Fractographic
a. 金属断面的显微镜观察的
🗣️ 情景例句
When are Susan and Harry picking you up, Marilyn?
Susan和Harry什么时候来接你们， Marilyn
He who risks nothing, gains nothing.
不入虎穴，焉得虎子。
This is the school building.
这是学校大楼。