The big brother is 4 years old, the little brother is half his age, how old would the little brother be when the big brother is 100 ?

哥哥4岁的时候，弟弟的年龄是哥哥的一半，那么哥哥100岁的时候弟弟几岁？

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Old-timers used it to describe a man who had just arrived from one of the big cities back east.

VOA: special.2010.05.23

I saw an old lady wearing a big classical hat today.

今天我看到一个年迈的女人戴着一顶很大的复古帽子。

英国皇家赛马会 - SpeakingMax英语口语达人

But if you're going to have a big old fort, and you're going to have lots of cannon that you hope to use against your craven, reptile enemies that would want to get in your way, you've got to have people to try out the cannon.

如果你想攻占一个大型的旧式堡垒,你必须要有很多大炮,来对付那些缩在城堡中的敌人,还需要很多士兵来操纵这些大炮

耶鲁公开课 - 欧洲文明课程节选

What will soon be the new Big East does not contain the market star power that the old Big East captured.

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That could help keep big biotech firms such as Amgen and Genentech insulated from the kind of generic competition that is hurting old big pharmaceutical firms.

FORBES: Magazine Article

And the increase in forecast budget surpluses has anyway shifted the debate away from the old big-government-versus-small-government arguments of the 1980s.

ECONOMIST: The rat-race