The ability of clay minerals to catalyse decarboxylation has long been recognised.粘土矿物能催化脱羧基作用是早已认识到的问题.The results demonstrate that this catalyse has an excellent activity and selectivity this reaction.结果表明该催化剂对此合成反应具有很...
He used to be a dunce at school.他上学时曾是个笨学生.Michael may have been a dunce at mathematics, but he was gifted at languages.迈克尔在数学上可能不太灵光，但在语言方面很有天赋。I was a dunce at chemistry.我在化学方面是个劣等生....
It is a collision zone between Jiangnan landmass and Cathaysia landmass.它是江南陆块与华夏陆块神功运动形成的碰撞拼贴带.They replenish the Xiakangjian flora and verify that this flora belongs to the Cathaysia - Gondwana mixed flora.等植物化石,进一步完善了...