second order spectrum 第二级光谱 ; 二级图谱 ; 二级光谱
second d order spectrum 第二级光谱
second order wind spectrum 二阶风速谱
second order power spectrum 二阶功率谱
second order derivative spectrum 二阶导数谱
ultraviolet second-order derivative spectrum 紫外二阶导数光谱法
·2,447,543篇论文数据，部分数据来源于NoteExpress
Then, based on defining three conceptions called as the second order spectrum, two theorems about the second order spectrum were proven.
然后，以定义三个叫做二阶谱的概念为基础，证明了两个关于二阶谱的定理。
youdao
应用推荐
模块上移
模块下移
不移动