1.  At the same time, some trades has turn into the women's patent, such as nurse, nanny, weaver and so forth.

2.  All these jobs are open to women, even though we can't deny that some men ever try to enter into the special trade and wish to be accepted by the society.

3.  To many trades, strength is the key part to the work efficiency.

4.  Meanwhile, the development of international trade and the irreversible trend of globalization further blur the boundaries among races and groups.

5.  Since the 20th century with the development of technology , the increasing unanimity of the world has led to more and more communications between areas in trade , technology , education and so on.

6.  The WTO, which is the result of the economic globalization, is aimed to fight a great variety of trade barriers.

7.  International trade has demonstrated the necessity of skipping regional and racial gaps with prosperity.

8.  We may still gasp when we talk about closing the country to international intercourse in Qing Dynasty which banned international trade and kept itself blind to the revolution of the outside world.

9.  Once our ancestors fed themselves only by slash-and-burn, with the connection to the external groups, they learnt to exchange and trade, which brought more variety of goods and abundance in supplies mutually.

10.  This ice-breaking relationship between groups and races reflects the simple rule "absolute advantage" of Adam Smith on international trade.