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 ...
Any of various birds of the order Galliformes, especially the common, widely domesticated chicken ( Gallus gallus ).鸟禽类鸡形目里任何一种鸟, 尤指普通的 、 广泛家养的小鸡 ( 原鸡 )Babies lose heat much faster than adults, and are especially vulnera...