Every other person on the planet has his first amorous kiss before reaching the age of 14.

这个地球上，每两个人中就有一个人在14岁之前有了初吻。

youdao

Experts say about half of all mental health problems first appear before the age of fifteen.The countries with the highest percentages of young people are in the developing world.

专家称，大约有一半的心理健康问题在15岁之前就会首次暴露。

youdao

In Utah, it is illegal to marry your first cousin before the age of 65.

在犹他州，65岁之前与第一代堂表亲结婚是违法的。

youdao

And what we find, the first example of a Bronze Age-- and I use the word civilization now for the first time, because before the Bronze Age-- there is nothing that we would define as civilization.

我们发现的第一个文明出现在青铜时代,也是我第一次用文明这个词,因为在青铜时代之前,没有任何东西能称之为文明

耶鲁公开课 - 古希腊历史简介课程节选

Tennis fans will notice an important similarity between player and coach: Mr. Lendl lost his first four Grand Slam finals and was seen as mentally weak before winning his first at age 24 and then winning seven more.

WSJ: Andy Murray Tries to Crack Tennis's Inner Circle

Since 2004 MMR vaccination coverage has generally increased each year - in June 2011 quarterly figures showed it had reached 90% in the UK, for the first dose taken before the age of two.

BBC: MMR vaccine uptake reaches 14-year high

He must have done something right because I carried this lesson into my adult life, enabling me to buy my first piece of property before the age of 25.

FORBES: What My Dad's Death Taught Me About Money