antecedents
[æn'tɪsi:dnts]
n.
经历( antecedent的名词复数 );
（比例）前项;
前件;
祖先;
例句:
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We shall first look briefly at the historical antecedents of this theory.
我们首先应大致看一下该理论在历史上的前身。
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His mechanical calculating engines were the antecedents of the modern computer.
他的机械计算机是现代电子计算机的雏形.
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No one knew the antecedents of the mysterious stranger.
谁也不知道那个神秘陌生人的身世.
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Of Kurdish antecedents, he gives no hint of sectarianism.
来自THETIMES
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Modest as he is, these are Van der Straeten's skilled antecedents.
来自WSJ
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Le Fil is that rare thing - a genuine surprise, without obvious antecedents, and a quite gorgeous pop album too.
来自BBC