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- Due to its relative small losses, theoretically it is supposed to get 50% of conversion effi. ciency at a pump level of 600 mW by using a BBO crystal with cutting angle of 27.030 and length of 10mm. 从分析其性能出发通过计算指出，使用BBO晶体获得倍频426nm蓝光(切割角度为27.;430，长度为10mm)，虽其非线性转换系数小，但由于该晶体的损耗小，在泵浦功率约为600mW时。 理论上同样可以得到50%25的倍频转换效率。
- Three kinds of pump levels is introduced at first,through optical design optimizing the EDFA optical system is builded,then achievement of EDFA’s electronic system. 首先介绍了三种不同的泵浦结构的掺铒光纤放大器，经过光路的优化设计，最终确定了实际的光路图。
- I'd like a room on the upper level. 我想要楼上的房间。
- He pumped funds into the new project. 他把资金注入新工程。
- We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
- He pumped my hand (up and down) vigorously. 他握住我的手用力地(上下)摇晃。
- I hope you'll be on the level with me. 我希望你对我坦率布公。
- She needs to win this point to level the score. 她要赢得这一分才能将比分扳平。
- Keep a level head and phone the Fire Department. 保持冷静，打电话给消防署。
- A football field should be level. 足球场地应该平坦。
- She pumped out of the little boy where he had put the bag. 她追问那小孩让其说出把包放到了何处。
- The rising level of crime is a sign of the times. 犯罪率增高是这一时代的特徵。
- I have told the whole story on the level. 我已经诚实地把整个事情经过讲出来了。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- Find level ground for the picnic table. 找一处平坦的地面放野餐的餐桌。
- This mountain is 1,400 meters above sea level. 这座山海拔1,400米。
- He has a level head in emergencies. 他在危急关头能镇定自若。
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- If the table top isn't level, things will roll off. 如果桌面不平，东西就会滚下来。
- The level of inflation has gone beyond 8%. 通货膨胀率已经超过了8%。
