foreign
单词辨析：
指属于另一个国家的，比 foreign 更正式，但没有 foreign 使用普遍，且常含贬义。
They were opposed to the presence of alien forces in the region.
他们反对外国军队驻扎在该地区。
He was interested in alien cultures.
他曾对异域文化感兴趣。
尤指来自热带国家的。
I like brightly-coloured exotic flowers.
我喜欢色彩鲜艳的异国花卉。
She prefers to travel to exotic places.
她更愿去有异国风情的地方旅行。
普通用词，泛指来自他国的或与他国有关的。
After living in foreign countries for many years, he returned home.
在国外居住多年之后，他回到了家。
All foreign troops must be withdrawn immediately and unconditionally.
所有外国军队必须立即无条件地撤出。
指来自、存在于或发生在海外国家的，只作定语。
There are many overseas students now coming to China to study Chinese.
现在有很多外国留学生来中国学习汉语。
The company has invested more money into its overseas market.
该公司已经将更多的资金投入了海外市场。
相关例句：
She has mastered a foreign language by aid of a grammar and dictionary.
她借助语法书和词典掌握了一门外语。
The foreign ministers of the two countries signed the documents today.
两国的外交大臣今天签署了文件。
He limited payments on the country's foreign debt
他对该国外债的偿还作出了限制。
It is the largest ever private foreign investment in the Bolivian mining sector.
这是玻利维亚矿业史上最大的一次来自国外的私人投资。
She was on her first foreign holiday without her parents.
她第一次在没有父母陪伴的情况下自己去国外度假。
The whole thing is foreign to us.
我们对整件事不了解。