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alertness
词根词缀
Online Etymology Dictionary
alertness
n.
1714, from alert + -ness.
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crack-
crack
crackdown
cracked
cracker
cracker-jack
crackhead
cracking
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crackpot
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cracy
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cradle
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craft
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craftsman
crafty
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craggy
cram
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crampon
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更新时间:2025/5/28 17:45:36