他的儿子只有六岁这句话用英语怎么说
问题描述：
他的儿子只有六岁这句话用英语怎么说
答
His son is only six.
答
His son is only six years old./He has a six-year old boy.
答
His son is only six years old
答
His son is only 6 years old.
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