在时机的问题上,这是首先被发现的,在1980年代,正在马里兰的。
Then one sunmmer when Grandpa was eighty-nine years old,all he could do was watch from his lawn chair as the vegetables grew and the roses bloomed.等到爷爷八十九岁的那个夏天,他只能坐在草地的椅子上,看蔬菜长大,玫瑰开花。
Eighty-nine countries offered infant immunization against Hib by the end of 2004, with two of those countries providing it in parts of their territories.到2004年年底,有89个国家提供针对Hib的婴儿免疫接种,其中2个国家在其部分领土提供这种免疫接种。