常見例句雙語例句The deactivation of hydrogenation catalyst of 3 - hydroxy propionic aldehyde was studied.對3- 羥基丙醛加氫催化劑的失活原因進(jìn)行了研究。PVA was partly modified with aldehyde by way of hydroxy-protected in the following experiments.本研究采用羥基保護(hù)的方法，對PVA材料進(jìn)行部分縮乙醛化初步改性； 返回 hydroxyaldehyde