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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
褐雨燕
swifts — plural of swift
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褐雨燕；快速爬行的小蜥蜴；迅速的；快的
United States meat-packer who began the use of refrigerated railroad cars (1839-1903)
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United States meat-packer who began the use of refrigerated railroad cars (1839-1903)
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an English satirist born in Ireland (1667-1745)
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a small bird that resembles a swallow and is noted for its rapid flight
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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT.