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- frontier electron density method 前线电子密度法
- Everything is quiet on the frontier. 边境上一切安静。
- The car was turned back at the frontier. 汽车在边境处被拦住了。
- Our frontier guards held up under fierce enemy attack. 我们的边防战士在敌人猛烈进攻下巍然不动。
- The frontier ranges from the northern hills to the southern coast. 边界从北部山地一直延伸到南部海岸。
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- The frontier range from the northern hill to the southern coast. 边界从北部山地一直延伸到南部海岸。
- By pooling our talents and resources we can make space a new frontier of peace. 如果我们把才能和资源汇合起来，就能把太空这个尚未开拓的疆域变成一个新的和平疆域。
- The soldiers garrison the frontier. 战士们驻守边陲。
- 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
- We must show our passports at the frontier. 在边境我们必须出示护照。
- Professor Field was devoted to the exploration of the frontier of Medicine. 菲尔德教授致力於探索医学研究的新领域。
- frontier electron density 前沿电子密度
- He wrote a book descriptive of the frontier provinces. 他写了一本描写边疆各省的专著。
- He came from the remote frontier. 他来自遥远的边疆。
- 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
- The frontier was pushed westward. 边疆向西扩展。
- 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
- This new frontier incident probably means war. 这个新的边境事件可能导致战争。
- Land located on or near a frontier. 边疆，边境位于或靠近边界的土地
