In furn . Practice makes theory perfect .

再反过来让实践充实和完善理论。

By 2025 at the latest , about half the voters in american and most of those in western europen countires will be over 50 and older people furn out to vote in much greater number than younger ones .

最迟在2025年，美国的半数选民以及西欧的绝大部分选民年龄会超过50岁，届时，老年选民也会多于年轻选民。