Our daughter could walk when she was nine months old.

我们的女儿九个月大就会走路了。

《牛津词典》

When Tiger was nine months old, Earl sawed off the top of an old golf club.

老虎长到九个月大，伊尔把一把高尔夫球棒的顶端锯掉给他了。

youdao

My father died when I was nine months old, making my mom a single mother at the age of eighteen.

在我九个月大的时候爸爸去世了，妈妈成为了单身母亲，那时候她十八岁。

youdao

When these children were nine months old their mothers were asked whether they had drunk alcohol during pregnancy.

BBC: Light drinking 'not harmful to baby' say scientists

She was just nine months old at the time, but Mr Jameson is not phased by its historic significance.

BBC: Bill Jameson

The twins, now nine months old, are doing well at home.

WSJ: How Hospitals Save More Lives and Reduce Infections in Premature Babies