本期内容：

Countries around the world have closed their borders to arrivals from China, as officials work to control the rapid spread of the coronavirus.
The US and Australia said they would deny entry to all foreign visitors who had recently been in China, where the virus first emerged in December.
But global health officials have advised against such measures.

border n. 边境
arrival n. 来访人员；到达
rapid adj. 迅速的
coronavirus n. 冠状病毒
• novel coronavirus: 新型冠状病毒
deny vt. 拒绝（reject）
emerge vi. 出现（appear）
• emergency n. 紧急事件；突发情况
• emergence n. 出现，兴起


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