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eta

noun
🔊/ˈiːtə/
🔊/ˈiːtə/
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  1. the 7th letter of the Greek alphabet (H, η)希腊字母表的第 7 个字母
    Word Originfrom Greek ēta.

ETA

abbreviation
🔊/ˌiː tiː ˈeɪ/
🔊/ˌiː tiː ˈeɪ/
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  1. estimated time of arrival（航班等的）预计到达时间
    (the time at which an aircraft, a ship, etc. is expected to arrive)     compare ETDTopics Transport by airc2