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- An electrode used in certain electron tubes to provide secondary emission. 中间极，二次发射电极一种用于一定电子管作第二次发射电极
- Her age is of secondary interest. 她的年龄不太重要。
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- In secondary school, children get more advanced knowledge. 在中学，孩子获得更深一些的知识。
- A secondary matter; a side issue. 次要的第二位的事; 较次要的问题
- A secondary mine passageway between two main shafts or tunnels. 次要矿山甬道矿井中连接两条大隧道的小巷道
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- The government introduced universal secondary education years ago. 几年前，政府就倡导普及中等教育。
- Our aim is that all children complete secondary education. 我们的宗旨是让所有孩子完成中等教育。
- Many older people still believe that women's careers are secondary. 许多年岁大一点的人仍然认为妇女的职业生涯并不那么重要。
- All other considerations are secondary to his safety. 现在首先要考虑的是他的安全，其他事都是次要的。
- In secondary school, students get more advanced knowledge. 在中学里，学生获得更深一些的知识。
- The number of electron pairs an atom can share with other atoms. 共用电子对数，共价一个原子与其他原子共用的电子的对数
- An electron with a negative charge, as contrasted with a positron. 电子带有负电荷，与正电荷相反的电子
- electron secondary 二次电子
- A secondary nitramide is then formed. 其结果生成仲硝酰胺。
- Anothar name for secondary school is high school. 中学又叫高级中学。
- Attempts to split an electron always fail. 企图分裂电子的尝试总是失败的。
- Such considerations are secondary to our main aim of improving efficiency. 对於我们提高效率的主要目的来说，这些想法都是次要的。
- An electron from one of the atom shells is ejected. 电子从原子的某一壳层中被弹射出来。
