Electronfractography
断口电子显微镜检验
🗣️ 情景例句
It was wet yesterday.
昨天下雨。
Do not give a dog bread every time he wags his tail.
不要有求必应。
It is thought that they arrived more than 30,000 years ago by crossing a land bridge from Asia to America.
他们被认为是在3万多年以前从亚洲跨越一座陆桥来到美洲的。