Electronfractography
断口电子显微镜检验
🗣️ 情景例句
My little boy is having a school play tonight, I don't want to miss it.
我的小儿子今晚会参加学校的戏剧表演，我不想错过了。
This stain is really stubborn.
这污垢去不掉。
Because the equipment for adding sound to films had not yet been developed.
因为给电影配音的设备还没有研制出来。