Average fixed cost: Total fixed cost divided by output. Average fixed cost declines as production is increased.

The main hypnoses of the models are as follows: a leading manufacturer, a single product, a single period, complete and symmetrical information, linear demand function, linear supply function of used products, average fixed cost of channel cost, et al.

模型的主要假设是制造商主导、单一产品、单周期、信息完全且对称、需求量是需求价格的线性减函数，回收量是回收价格的线性增函数，销售和回收的单位渠道成本固定等。

Statement by Secretary Kerry on the Peoples Republic of China National Day

凯里部长关于中华人民共和国国庆节的声明

There was heavy traffic everywhere during the national day.

国庆节其间，到处的交通都很拥挤。

National Day is coming, and we can have a seven-day.

国庆节来了，我有七天的假期。我们一家去海南。

And all I kept thinking about was the fourth of july.

但我一直在想着国庆节。

What activities will be held in this National Day?

今年的国庆节都有什么庆祝活动啊？

My what gift do you give the national day?

国庆节你给我什么礼物？

The National Day holiday is a time for trips.

国庆节假期是旅行的时候。

National Day saw people singing and dancing happily in the street.

国庆节里人们在大街上高兴地唱啊跳啊！

This is the first National Day since I came to China.

这是我来中国后的第一个国庆节。

When's your national holiday? Let's celebrate National Day.

你们的国庆节是哪一天？？让我们庆祝国庆节！

How do you celebrate National Day in your country?

你们国家如何庆祝国庆节？

The National Day, is a important festival in China.

国庆节是要的传统节日。

During National day, I have switched with Lao wang.

国庆节期间，我和老王换了斑。

Public buildings were lit up for celebrating the National Day.

为庆祝国庆节，公共建筑物灯火辉煌。

On October lst we set off firecrackers in many places.

十月一日国庆节，我们在各地放鞭炮。

So we had the National Day holiday of seven days.

就这样我们度过了国庆节七天的假期。

Dario: national day is coming, are you happy?

达里奥：国庆节马上来了，你快乐吗？

Prices went up on Monday following the National Holiday slowdown.

金价在国庆节期间上升势头放慢后于星期一重新上扬。

The fourth of july, is that what's next?

下一个节日是国庆节么？