It's almost 15 years old. It isn't worth having it repaired.
这东西差不多15年了。不值得送去修了。
These rocks have been dated radiometrically at two billion years old.
经辐射能探测，这些岩石形成于20亿年前。
The most ancient parts of the continental crust are 4000 million years old.
该大陆地壳最古老的那些部分有40亿年了。
它已经有100多年的历史了。
Now, my son is eight years old and my daughter is five years old.
现在我儿子八岁，女儿五岁了。
珍妮17岁。
我14岁。
他十岁了。
Nora thought he was seventeen years old.
诺拉觉得他有17岁。
他58岁。
I was a virgin until I was thirty years old.
我到30岁时还是个处女。
A quarter of the residents are over 55 years old.
1/4的居民在55岁以上。
The dirty-faced waif was only five or six years old.
这个流浪儿脸上脏兮兮的，只有五六岁大。
In those days most people left school when they were only fifteen years old.
那时候，大多数人上学只上到十五岁。
I enjoyed experimenting with colours – it took me back to being five years old.
我喜欢尝试各种颜色–这使我回忆起5岁时的情景。
Fossil hunters have unearthed the bones of an elephant believed to be 500,000 years old.
化石寻找者们挖掘出了一头被认为有50万年之久的大象遗骨。
Young children are beginning their formal education sometimes as early as four years old.
幼儿有时早在四岁时就开始接受正规教育。
Children don't complete their set of 20 baby teeth until they are two to three years old.
孩子到两三岁时才长齐20颗乳牙。
我的儿子今年十二岁了。
杰克只有四岁。
他们是十三岁了。
简十二岁了。
史密斯50岁了。
朱莉十岁了。
我七十岁了。
你32岁。
她十岁了。
When I was eight years old, my sister was three years old.
我八岁的时候，我妹妹三岁。
她儿子三岁了。
他12周岁。
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