短語詞組短語IR transmission spectrum 紅外透過譜ir photoacoustic spectrum 紅外光聲光譜ir -spectrum 紅外光譜ir emission spectrum 紅外光譜ir absorption spectrum 紅外吸收光譜ir vibrational spectrum 紅外振動光譜IR radiation spectrum 紅外輻射光譜reflective ir -spectrum 紅外反射譜ir differential spectrum 紅外差譜 返回 ir spectrum