This tree is about 350 years old.
这棵树大约有350年的历史。
When you drive through the Redwood Forests in California, you will be among trees that are over 1,000 years old.
当你开车穿过加利福尼亚的红杉林时，你将置身于有1000多年树龄的树木之中。
He emigrated to the United States when he was seventeen years old, and was naturalized on his twentieth birthday.
他十七岁时移居美国，二十岁生日时就入籍了。
She started to learn the piano at the age of 4, and she sang her first song on the stage when she was 9 years old.
她4岁开始学习钢琴，9岁时就在舞台上唱了第一首歌。
I was twenty years old and ready for anything.
我当时二十岁，什么都愿意去做。
I enjoyed experimenting with colours – it took me back to being five years old.
我喜欢尝试各种颜色–这使我回忆起5岁时的情景。
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。
You are nearly twelve years old, my boy.
你快十二岁了，我的孩子。
When he died in 1973, he was ninety-one years old.
他于1973年去世，享年91岁。
I'm twelve years old, and I live in Barcelona, Spain.
我今年12岁，住在西班牙的巴塞罗那。
Hello everybody, my name is David and I'm eight years old.
大家好，我的名字叫大卫，我今年八岁了。
He began to learn English letters when he was seven years old.
他在七岁时开始学习英文字母。
When I was about six years old, my brother David and I visited our aunt, Mary.
在我六岁左右的时候，我和弟弟大卫去看望了我们的姑姑玛丽。
By the time Alexandra was seven years old, she had begun painting with oil paints.
Alexandra七岁的时候，就开始用油画颜料画画了。
Alexandra's first public show was held at a Los Angeles public library when she was only eight years old.
亚历山德拉的第一次公开展览是在洛杉矶一家公共图书馆举行的，当时她只有8岁。
When I was eight years old, my father taught me to play tennis, and I have fallen in love with it since then.
我八岁的时候，我父亲教我打网球，自那时起我就爱上了网球。
Despite the fact that my grandmother is already eighty years old, she still keeps doing exercise every morning.
尽管我奶奶已经八十高龄了，她每天早上仍然坚持做运动。
When Canadian teenager Ryan was six years old, his teacher told him that in many parts of Africa, there was no clean water.
当加拿大少年瑞安六岁的时候，他的老师告诉他，在非洲的许多地方没有干净的水。
One day, while I was waiting for my father, I saw a little boy, around two years old, running freely on the grass as his mother watched from a short distance.
一天，当我在等爸爸的时候，我看见一个大约两岁的小男孩在草地上自由地奔跑，他妈妈就在不远处看着。
My daughter is nine years old.
我的女儿九岁了。
我的儿子今年十二岁了。
The Grand Canal is more than 2,500 years old.
大运河有2500多年的历史。
He began to play tennis when he was six years old.
他六岁时就开始打网球了。
Our group is two years old and made up of 14 students.
我们团队成立两周年了，由14名学生组成。
I have played the guitar ever since I was 8 years old.
我从8岁起就开始弹吉他。
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