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adj.反动的,追溯的,有追溯力的,从以往某天开始生效...
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The seagulls swirled in aerial combat over the barges.海鸥盘旋在驳船上方,展开空中的搏斗。a flock of seagulls一群海鸥Seagulls followed in the wake of the huge ship.海鸥尾随于大船之后....
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retroactive的音标:retroactive的英式发音音标为:[ˌretrəʊ'æktɪv]retroactive的美式发音音标为:[ˌretroʊ'æktɪv]...