俗话说：人老先老腿。
老流浪汉先领我走到一张桌子前，请我坐下稍等片刻，他则到一排排的书架上去翻找那些特别的东西。
The bum first led me to a table and asked me to sit down and wait for a moment while he looked for something special amongst the shelves.
一些中国人口专家担忧届时可能面临未富先老的问题。
Some Chinese demographers worry that the country will get old before getting rich.
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