慈善音乐会 benefit concert ; charity concert ; fundraising concert ; Love Regeneration Charity Show

噪音改善系数 noise improvement factor

噪音改善 noise improvement

不善辨别音高 tone-deaf

音乐改善人的性情 Music to improve human nature ; Music improve people's disposition

不善辨别音高的 tone deaf

立体声确实能改善串音 Clear Stereo

音质改善 tone quality improvement

改善发音 Improve your pronunciation

完善高师音乐教育 China Music Education