Macrofractography
断口低倍检验, 断口宏观检验
🗣️ 情景例句
Hi, Marilyn,
嗨 ，Marilyn。
Skill and confidence are an unconquered army.
技能和信心是不可克服的军队。
I tried to say something, but my mouth was full of cotton wool.
我想说点什么，但我嘴里塞满了药棉。