only four years old 只有四岁 ; 仅仅四岁 ; 仅仅只有四岁 ; 仅有四岁大
Jack is only four years old.
杰克只有四岁。
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Little Jack has learned to do lots of things on his own, though he is only four years old.
尽管小杰克只有四岁，但他已经学会了自己做很多事情。
Only five members were left: the manager and four others, all over 60 years old.
只有五名成员留了下来，即经理和其他四人，他们都超过60岁了。
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