This is the traditional adult age in Australia and the USA and the UK.
这是澳大利亚、美国和英国的传统成年年龄。
Even though 21 is the traditional adult age in many English-speaking countries the law nowadays is different in each country.
尽管在很多讲英语的国家21岁是传统的成年年龄，但现在每个国家的法律都不一样。
At the age of eighteen the law provides adult responsibilities as well as rights.
18岁时，法律规定了成年人的权利和责任。
At around age 60, "muscles really start to break down," say Kathryn Starr, an aging researcher, "and because of that, the protein needs of an older adult actually increase."
在60岁左右，“肌肉真的开始分解，”一位研究衰老的研究员凯瑟琳·斯塔尔说，“也正因为如此，老年人对蛋白质的需求实际上增加了。”
In many countries, sixteen or eighteen is the age when a person becomes an adult.
在许多国家，十六或十八岁是一个人成为成年人的年龄。
The question is 'At what age do you really become an adult?'
问题是‘在哪个年纪你才真正成为成年人？’
No matter what age you are, becoming an adult is really about learning how to be independent and responsible.
无论在哪个年龄，成年实际上是关于学会如何独立和负责任。
No matter what age you are, becoming an adult is really about learning how to be independent and responsible.
无论在哪个年龄，成年实际上是关于学会如何独立和负责任。
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