这份参考资料对您来说并不是永远都必备，但是，初学时它可以帮您解决一些问题，为您指出一条新的而且我认为是充满乐趣的计算途径。
It's not the only reference you'll ever need, but it will help you get past some of your first obstacles and adjust to a new and, I think, exciting approach to computing.
我国初学游泳教学一直存在两个问题：游泳作为一项人人必备的生存技能在学龄人群中还不够普及；
Two main problems have existed for a long time in the elementary swimming teaching in our country. First, swimming as a survival skill has not been popularized among school age people;
我国初学游泳教学一直存在两个问题：游泳作为一项人人必备的生存技能在学龄人群中还不够普及；
Two main problems have existed for a long time in the elementary swimming teaching in our country. First, swimming as a survival skill has not been popularized among school age people;
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