Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied. 环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素.
Australia is the hometown of kangaroos.澳大利亚是袋鼠的故乡.There are all sorts of animals, including bears, pigs, kangaroos, and penguins...有各种各样的动物，包括熊、猪、袋鼠和企鹅。Kangaroos are indigenous to Australia.袋鼠为澳大利亚本地的动物.There are all sor...