慢速英语:Apple Makes 'the Best Smartwatch,' Not for Everyone

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词汇讲解：

1. refine vt.提炼; 改善
例句：Reading good books helps to refine our speech. 
读一些好书有助于使我们的言谈更优雅。 

2. observe vt. 观察; 研究
例句：What did the expedition observe? 
这次考察观察什么呢？ 

3. interact v.相互作用; 互相影响
例句：You have to understand the way they interact. 
你得理解他们相互交往的方式。 

4. available adj.可获得的; 有空的
例句：Shakespear's works are still available today. 
莎士比亚的著作至今还存在。 

5. afford vt.买得起; 担负得起
例句：Few could afford the luxury. 
很少有人买得起这种奢侈品。