abroad [əˈbrɔːd]
adverb. (of a person) in or to a foreign country or countries
1. In the summer, many students choose to study abroad to experience different cultures.
在夏天，许多学生选择出国留学，体验不同的文化。
2. My brother has been living abroad for 10 years and he can speak five languages fluently.
我弟弟已经在国外生活了10年，他能流利地说五种语言。
3. The company is looking for someone who has experience working abroad.
公司正在寻找有国外工作经验的人。
4. Many young people dream of traveling abroad and seeing the world.
许多年轻人梦想着出国旅行，看看世界。
5. She moved abroad after getting married to a man from France.
她和一位来自法国的男人结婚后移居海外。
用法
abroad是一个副词，表示“在或到国外”。它可以用来描述一个人的位置或行为。通常与动词be、live、study、work等连用。
同义词及用法
overseas [ˌəʊvərˈsiːz] adverb. in or to a foreign country, especially one across the sea
1. Many people choose to buy cheaper goods overseas and bring them back home.
许多人选择在海外购买更便宜的商品带回家。
2. The company is expanding its business overseas and opening new branches in Asia.
公司正在扩大海外业务，在亚洲开设新分支。
3. My parents are going overseas for their anniversary trip.
我父母要出国度过他们的结婚纪念日。
4. She works for an overseas company and travels a lot for her job.
她在一家海外公司工作，因工作需要经常出差。
5. The government is promoting overseas investment to boost the economy.
正在推动海外投资，以促进经济发展。
总结
abroad和overseas都表示“在国外”，但是overseas强调跨海，更多用于描述跨国的事物。abroad则更常用于描述一个人的位置或行为。在写作中可以根据具体语境选择使用哪个词。
