So maybe this is just a sign of the times, even if four years of age is perhaps a bit early to be an early adopter.

所以这是时代的象征，即使四岁小孩也许有点早。

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All in all we have no elements to dismiss the tradition of two conjoined twins being born in 1100, living to be thirty-four years of age and starting a long-lasting charity.

总之，我们都没有理由忽视这个传说：1100年一对连体婴出生在比登登，她们活了34年，并创始了一项经久不衰的慈善活动。

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Concerned at the increase in accident fatalities, Tennessee adopted a child-passenger protection law requiring that parents restrain children under four years of age in a child safety seat.

田纳西州因为担心车祸死亡率上升，颁布了儿童乘客保护法，要求父母乘车时把四岁以下的孩子限定在儿童安全座上。

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They also include workers in health care and emergency services, and people between six months and twenty-four years of age.

VOA: special.2009.08.18

Not until the nineteen fifties did scientists, using radioactive dating, place the age of the Earth at over four billion years.

VOA: special.2009.12.01

The same was true of almost one in four children under two years of age.

VOA: special.2009.10.28

Addendum: If you are under four years of age, and incapable of donning your own mittens without assistance, you have a limited right to notify others about your cold, wet fingers.

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Data on autistic intelligence was often gathered during childhood, at about four or five years of age.

BBC: NEWS | Science/Nature | Autistic ability 'underestimated'

He is one ahead of two-time winner Miguel Angel Jimenez of Spain, China's Zhang Lian-wei and Swede Fredrik Andersson Hed, the top four all 40 years of age or older.

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