高电平调制
modulation───n.[电子]调制；调整
modulation index───调制指数，调制度；[电子][通信]调制指数
amplitude modulation───n.调幅；调幅；波幅调制
frequency modulation───调频
level───n.水平；标准；水平面；vt.使同等；对准；弄平；adj.水平的；平坦的；同高的；n.(Level)人名；(法)勒韦尔；vi.瞄准；拉平；变得平坦
high is high───高就是高
dumpy level───[测]定镜水准仪
hook level───吊钩水平仪
hierarchy level───层次结构
topology and modulation method of high-power inverter is introduced. Described the implementation principle of multi-level inverter with cascaded H bridge based on 2-level control technique.───多电平逆变器发展前景进行概述，介绍了大功率逆变器的拓扑结构及调制方法。
The invention is a micro-accelerometer of the silica-based ring resonator with the advantages of small size structure, high integration level and high modulation speed.───本发明是一种结 构尺寸小、集成度高、调制速度快的硅基环形谐振腔的微加速度计。
This scheme exhibits a good PAPR reduction performance, and for signals of high level modulation, such as 16qam and 64qam, it approaches the best performance of all SLM schemes.───该方案在抑制峰均比方面呈现出很好的性能，对于高阶调制信号，如16 QAM和64qam，它甚至达到选择性映射所能实现的最佳性能。