当我12岁时，我在我父亲的小砖厂做暑期工。

When I turned 12, I worked summers at my father's small brick cleaning business.

我12岁的时候，妈妈送我去了加州的一所中文学校。

When I was 12 years old, my mother sent me to a Chinese school in California.

今年我12岁了，我的父母给了我12份礼物，其他人都给了我衣服或钱。

As this year I turned 12 my mum and dad gave me 12 gifts and everyone else gave me clothes or money.

等我12岁时我在来看你啊

Mum, wait me until i am 12-year-old.

明天是我12岁的生日。

Tomorrow is my twelfth birthday.

我12岁时做过一系列的实验。

I did a series of experiments when I was 12.

我12岁了。

I'm twelve years old.

我12岁时读的。

When I was 12.

我今年15岁，但当我12岁多的时候，我遇上了一个13岁的男孩。

I'm 15 now, but when I was 12 1/2, I met a guy. He was 13.

当我12岁的时候，我就迷上了上网。

I got involved with Internet when I was 12.