慢速英语:Chinese Worker Killed in Vietnam Protest

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短语讲解：

1. Relations between China and Vietnam were tense this week because of Chinese activity in waters claimed by both sides.

because of 因为，由于
例句：Because of their relative rarity, they are often missed. 
因为相对少见，它们常被漏诊。 

2. The device was set up in an area that Vietnam says is within its Exclusive Economic Zone.

set up 建立
例句：They set up many branches throughout the country. 
他们在全国建立好多分公司。 

3. More than 100 other people were injured.

more than 不只是; 很; 超过; 在…次以上
例句：Revenue: more than$ 5 billion
年度收益：超过50亿美元

4. In Beijing, the Chinese government expressed serious concern about the situation.

concern about 使（自己）关心…
例句：There is a lot of concern about political transition.
人们对它的权力交接交接有很多担忧。