非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开，若省去，原句意思不受影响。
不可用that引导非限制性定语从句。关系词不可省略。
Every object has a gravitational pull,which is rather like magnetism.
*“介词+which\whom\whose”引导的定语从句
August 15th in Chinese Lunar Calendar is the Mid-Autumn Day.It is one of the most important traditional festivals in China.
On that day people usually go back home to have family reunion.Each family will have the members get together to have a big dinner.
The most popular food is moon cakes.They are round and look like the moon.
The moon is the brightest this night.People eat the delicious food while they are enjoying a beautiful full moon in their yard.
At this time,some old people would like to tell many past events and tell the children a story about the rabbit on the moon .
The children really believe that there is a rabbit on the moon.They hope to go to the moon and have a look one day.
农历八月十五日是中秋节,在中国它是最重要的传统节日之一.
在那一天,人们通常回家与家人团聚,一家人聚在一起饱餐一顿.最流行的食品是月饼,它们圆圆的就像月亮.
中秋节晚上的月亮特别地圆.人们都在自家的院子里一边赏月一边吃着可口的月饼.这个时候 ,一些老人会讲述许多古老的故事,如月亮上的'玉兔,孩子们信以为真,他们真想有一天登上月球看个究竟.
The Mid-Autumn Festival The Mid-Autumn Festival is a very important Chinese festival.
It’s on the fifth of August. We can hang lanterns in the house. In the evening, we have a big dinner.
Look, there is lots of food on the table. They are chicken, fish, crabs and so on. They’re very delicious.
We can drink a glass of juice. We stand beside the table and we say, “Cheers, cheers, happy Mid-Autumn Festival!”
We make a wish to each other. At night, the moon is usually round and bright. It looks like a ball. We can enjoy the moon.
Moon cakes are the special food for this festival. We can eat moon cakes, too.
In the Mid-Autumn Festival, my parents and I are all very happy and excited.
中秋节中秋节是一个非常重要的中国节日。它的关于第五八月.我们可以挂起灯笼,在众议院中。
在晚上,我们有一个大的晚宴。你看,有很多的食物放在桌上.他们是鸡,鱼,蟹等。
他们非常好吃.我们可以喝一杯果汁。我们的立场,旁边的桌子上,我们说：“欢呼,欢呼,快乐的中秋节!：”
我们希望对方.晚上,月亮通常是轮和光明的它看起来像一个球。我们可以享受月亮.月饼是特别的食物,这节.我们可以吃月饼。
