The 0.42ppm peak shoulder in the high field region is the upfield shift peak of A_2-isoleucine shielded by the proximate A_(19)-tyrosyl in the three-dimensional structure and it disappears in the DOI spectrum.是什么意思_The 0.42ppm peak shoulder in the high field region is the upfield shift peak of A_2-isoleucine shielded by the proximate A_(19)-tyrosyl in the three-dimensional structure and it disappears in the DOI spectrum.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句