The three-year-old boy can read and write
三岁───Three years old;男孩───boy
When he was three years old, his village was burnt in the war.───当他三岁的时候，他的村庄在战争中被烧毁了。
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。
When I was eight years old, my sister was three years old.───我八岁的时候，我妹妹三岁。
there was a middle-aged woman might have been a jewess sitting up in the bow with a little boy about three years old in her arms.───一个中年妇女样子像是犹太人坐在船头上怀里抱着个三岁左右的小男孩。
Yuan Liang hero is a blind, and she three years old respectively when the full moon and take off the eye, which is how much she blows ah!───主人公袁靓是一个盲童，她分别在满月和三岁时被摘掉眼球，这对她来说是多么大的打击啊！
These may be clear signs of it, but they usually do not appear until a child is two or three years old.───这些确实是自闭症的明显症状，但它们通常要在孩子两、三岁时才会显现。
At about three years old, children begin to take an interest in their peers.
From its registration number it was only three years old, and it looked well-kept, the front tyres were new.
Three years old and already drawing crowds.
Little Joe, almost three years old, turned bashful and hid behind Lucy's skirt.
The car was, after all, three years old and had over 50,000 miles on the clock.