Sem
abbr. 标准电子组件（Standard Electronic Modules）；扫瞄式电子显微镜（scanning electron microscope）
🏥 医学释义
扫描电子显微镜
🗣️ 情景例句
When you go to a new school it takes a while to know the ropes.
到一所学校读书要花一段时间熟悉情况。
I don't know where I've seen him before.
我不晓得在哪儿见过他。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，