玛尔塔一副沮丧的模样。Marta looked upset.玛尔塔喝了一杯果汁。Marta drank a glass of juice.玛尔塔: 佩德罗总是跟女孩子调情,有差不多二十个女朋友.Marta: Pedro's always flirting with girls and he has about twenty girlfriends....
R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.通过选择特定的同系物混合物, 可以达到应用性能的优化.By selection of specific homologous mixtures, application ...