Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.There a...
我在胳肢他，他哈哈哈、咯咯咯地笑个不停。I was tickling him, and he was laughing and giggling.比我高大的女孩过去总是追赶着胳肢我。The bigger girls used to chase me and tickle me.我胳肢孩子的脚,使她发笑.I tickled the baby's feet and made her laugh....
It's been billed as the race of the year.海报上宣传这是本年度的大赛.The new actor was billed for this week.这位新演员已贴出海报,本周登台献艺.The businessman was billed for delinquent taxes.那商人因拖欠税金而被罚款....