He tracked down his cousin and uncle. The latter was sick.他找到了他的堂兄和叔叔。他叔叔生病了。

The latter is the more expensive of the two systems.后者是两个系统中成本较高的。

Men still outnumber women, though the latter are catching up.男性仍然比女性多, 尽管女性的人数正逐渐赶上来。

The former lives in the US, the latter in Australia.前者住在美国, 后者住在澳大利亚。

in the latter half of the 17th century在17世纪下半叶

I prefer the latter version to the former.比起前一种说法, 我更喜欢后面那种说法。