He could find the way home though he was only three years old.

他虽然只有三岁，却能找到回家的路。

youdao

Though the little boy is only three years old, he can dress himself.

虽然这个小男孩只有三岁，但他能自己穿衣服。

youdao

The little boy is only three years old, but he can memorize about 50 poems.

这个小男孩只有三岁，但他会背50首左右的诗。

youdao

There are only three people left in Britain who fought in World War One, only three, and they're about 110-years-old or something like that.

在英国,一战老兵,只剩下三个了,就三个,他们得有,大概110岁

耶鲁公开课 - 1871年后的法国课程节选

Remember, the iPhone is only three years old, a toddler born June 29, 2007.

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The Bush Bazaar is only three years old, but locals say there was a similar market here in the 1980s, at the time of the Soviet occupation of Afghanistan.

NPR: Kabul's Bush Bazaar

It is also too early to say whether a single website will reverse decades of civic decline: meetup.com is only three years old and has just started charging, with unpredictable consequences.

ECONOMIST: Americans are joining clubs again