The structures of the target molecules and the key intermediates were confirmed by 1H NMR, 13C NMR and IR spectra in our experiments.是什么意思_The structures of the target molecules and the key intermediates were confirmed by 1H NMR, 13C NMR and IR spectra in our experiments.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句