对外开放是指一个或地区向外界敞开大门，允许外国人和外资进入本国进行贸易、投资、旅游等活动的。它是一种经济，也是一种国际关系，旨在促进经济发展和加强国际交流与合作。

How to read: duì wài kāi fàng

用法：对外开放通常指一个或地区的采取的措施，允许外国人和外资进入本国进行贸易、投资、旅游等活动。这种可以促进经济发展和加强国际交流与合作。

例句1：自1978年实行改革开放以来，不断推出新的对外开放举措，吸引了大量外资和技术。

Sentence 1: Since the implementation of the reform and opening-up policy in 1978, China has continuously introduced new measures for opening up, attracting a large amount of foreign investment and technology.

例句2：随着越来越多的加入世界贸易组织，全球贸易逐渐呈现出更加自由化、开放化的趋势。

Sentence 2: With more and more countries joining the World Trade Organization, global trade is gradually becoming more liberalized and open.

例句3：近年来，的对外开放不断升级，吸引了大量外国企业来华投资。

Sentence 3: In recent years, China's opening-up policy has been continuously upgraded, attracting a large number of foreign companies to invest in China.

例句4：作为一个发展中，巴西一直致力于推进对外开放，吸引外资和技术来促进经济发展。

Sentence 4: As a developing country, Brazil has been committed to promoting opening up and attracting foreign investment and technology to promote economic development.

例句5：随着互联网的发展，越来越多的企业开始走向国际市场，实现全球化经营和对外开放。

Sentence 5: With the development of the Internet, more and more companies are beginning to enter the international market and achieve globalized operations and opening up.

同义词及用法：开放、自由化、自由贸易、自由市场。这些词都可以用来表示或环境更加开放和自由，允许人们进行更多的交流和活动。

编辑总结：对外开放是一个或地区的重要，它可以促进经济发展和加强国际交流与合作。随着全球化进程的加速，越来越多的开始采取对外开放，并不断推出新举措吸引外资和技术。同时，对外开放也可以促进不同和地区之间的交流与合作，推动世界经济的发展。