South Korea is raising its COVID alert level to the second highest tier with infections rising to more than 600 a day.
韩国将新冠肺炎警戒级别提高至第二高级别，其每天感染病例超过600例。
| 单词 | tier with |
| 释义 |
tier with
原声例句
BBC世界头条 South Korea is raising its COVID alert level to the second highest tier with infections rising to more than 600 a day. 韩国将新冠肺炎警戒级别提高至第二高级别，其每天感染病例超过600例。 |
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