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单词
ballon d'essai
释义
ballon d'essai
n. (pl. ballons d'essai pronunc. same) an experiment to see how a new policy etc. will be received.
Etymology
: F, = trial balloon
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DBS
DC
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D-Day
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de-
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deactivate
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deadbolt
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deadfall
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更新时间:2025/11/22 9:58:47