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VOA慢速英语:联合国称全球婴儿和孕妇 每11秒就有一人死亡
2019-09-20来源:和谐英语
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pair - n. two things that are the same and are meant to be used together
adequate - adj. good enough : of a quality that is good or acceptable
precious - adj. greatly loved, valued, or important
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