本身

While it is difficult, for most learners, to understand what is the right vocality concept then to build up the right vocality concept for the invisibility of voice and the subjectivity of concept.

然而，由于声音本身的非可视性以及概念本身的主观性，大部分声乐学习者都很难把握什么是正确的声音，同时导致无法树立起正确的声音概念。

Therefore, the core of curriculum reform of foundation music education in new century is the change of curriculum itself, also the transform of individual ( including students, music teachers, researchers of music education, and so on) itself.

因此，可以说，新世纪基础音乐教育课程改革的核心，是课程本身的变革，也是人（包括学生、音乐教师、音乐教育研究人员等）本身的变革。

It is pointed out that the spectral class c is possibly originated from the nonhomogeneity of the source even if the internal absorption in the source is neglected.

指出，由于源本身的不均匀性即可产生c型谱（低频倒转），即使源本身是光学薄的，完全忽略其内吸收。